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#6576 2020-02-16 00:38:14

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4722. An urn contains 4 red, 3 blue, and 3 green marbles. If 2 marbles are picked at random, what is the probability of both being red?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6577 2020-02-18 00:51:44

ganesh
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Posts: 29,983

Re: Oral puzzles

Hi,

#4723. Three coins are tossed, find the probability of two heads obtained.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6578 2020-02-20 00:04:52

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4724. Two dice are rolled. Find the probability of getting sum 4.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6579 2020-02-21 04:18:54

math9maniac
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From: Tema
Registered: 2015-03-30
Posts: 443

Re: Oral puzzles


Only a friend tells you your face is dirty.

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#6580 2020-02-21 15:40:46

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

Good work, math9maniac!

#4725. A die is thrown twice. What is the probability of getting a sum 7 from both the throws?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6581 2020-02-23 00:34:25

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4726. Two dice are thrown simultaneously. Find the probability of getting a multiple of 2 on one dice and multiple of 3 on the other dice?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6582 2020-02-25 00:23:38

ganesh
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Posts: 29,983

Re: Oral puzzles

Hi,

#4727. A die is rolled and a coin is tossed, find the probability of the die showing an even number and the coin showing a tails.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6583 2020-02-27 00:32:51

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4728. A card is drawn at random from a deck of cards. Find the probability of getting a king or a spade.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6584 2020-02-29 01:33:00

ganesh
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Posts: 29,983

Re: Oral puzzles

Hi,

#4729. A card is drawn from a pack of 52 cards. The card is drawn at random. What is the probability of it being neither a spade nor a jack?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6585 2020-03-02 00:36:42

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4730. From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6586 2020-03-03 01:28:07

math9maniac
Member
From: Tema
Registered: 2015-03-30
Posts: 443

Re: Oral puzzles

Last edited by math9maniac (2020-03-03 01:28:27)


Only a friend tells you your face is dirty.

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#6587 2020-03-03 02:58:22

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

Good attempt!

#4731. When four cards are drawn in succession from a pack of cards with replacement, what is the probability of all the cards are from different suits?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6588 2020-03-04 00:32:31

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4732. Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability of the ticket being drawn has a number, which is a multiple of 3 or 4?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6589 2020-03-06 00:31:21

ganesh
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Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4733. Three unbiased coins are tossed. What is the probability of getting at most two heads?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6590 2020-03-08 00:53:08

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4734. A bag contains 3 white, 4 red, and 5 blue balls.  Two balls are drawn at random from the bag. Find the probability of both of them being blue.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6591 2020-03-10 00:23:03

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4735. A bag contains 7 blue balls and 5 yellow balls. If two balls are selected at random, what is the probability of none of them is yellow?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6592 2020-03-12 00:25:32

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4736. In a box, there are 8 red, 7 blue, and 6 green balls. One ball is picked at random. What is the probability of it being neither red nor green?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6593 2020-03-14 00:29:36

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

.

#4737. A bag contains 5 black and 6 white balls. James takes a ball and places it in the box. He again takes out a ball. What is the probability of both balls being white?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6594 2020-03-16 00:37:20

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4738. A bag contains 21 toys numbered 1 to 21. A toy is drawn and another toy is drawn without replacement. Find the probability of both toys showing even numbers.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6595 2020-03-18 00:31:44

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4739. Out of 13 applications for a job, there are 5 women and 8 men. It is desired to select 2 persons for the job. Find the probability of at least one of the selected persons be a woman.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6596 2020-03-20 00:28:31

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4740. The probability of success of three students A, B, and C in one examination are 1/3, 1/2, and 1/4 respectively. Find the probability of all three students failing in the examination,


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6597 2020-03-22 00:36:36

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4741. Four cards are drawn from a pack of 52 cards without replacement. What is the probability of they all have the same value?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6598 2020-03-24 00:41:06

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4742. A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability of the ball drawn being white?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6599 2020-03-26 00:22:37

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4743. What is the probability of a number selected from numbers 1, 2, 3, ......, 30 is a prime number, when each of the given number is equally likely to be selected?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#6600 2020-03-28 00:59:43

ganesh
Administrator
Registered: 2005-06-28
Posts: 29,983

Re: Oral puzzles

Hi,

#4744. A bag contains 13 white balls and 7 black balls. Two balls are drawn at random. What is the probability of they being the same color?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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