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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Keep trying!

825. If x = 11, then find the value of

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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**666 bro****Member**- From: Flatland
- Registered: 2019-04-26
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"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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**ganesh****Administrator**- Registered: 2005-06-28
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Good work!

826. If a, b, c be all positive integers, then find the least positive value of

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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**666 bro****Member**- From: Flatland
- Registered: 2019-04-26
- Posts: 621

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Good work!

827. A box contains 4 black balls, 3 red balls and 5 green balls.2 balls are drawn from the box at random. What is the probability that both the balls are of 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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**Denominator****Member**- Registered: 2009-11-23
- Posts: 198

Hello,

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Hi,

Neat work!

828. One-third of 12 mangoes got rotten. If 4 mangoes are taken out randomly, what is the probability that no mango is rotten?

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Hi,

829. A basket contains 3 blue, 2 green and 5 red balls. If three balls are picked at random, what is the probability that at least one is red?

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

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**Denominator****Member**- Registered: 2009-11-23
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Hello,

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**ganesh****Administrator**- Registered: 2005-06-28
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Hi,

Excellent!

830. From a group of 6 men and 4 women, two people are to be selected for a tour. Find the probability of at least one person is a man.

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

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**666 bro****Member**- From: Flatland
- Registered: 2019-04-26
- Posts: 621

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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**ganesh****Administrator**- Registered: 2005-06-28
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831. A box contains 5 red and 10 blue marbles. If 4 marbles are drawn at random, find the probability of at least two marbles are blue.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 872

Happy New Year!

*Last edited by irspow (2021-01-01 07:45:05)*

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
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Hi,

Excellent!

New Year Wishes to you too!

832. If two cards are drawn at random from a pack of 52 cards, find the probability of both being black or both being Jack.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 872

For 831, factor 21, 252/273=12/13

*Last edited by irspow (2021-01-01 14:41:03)*

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Hi,

Splendid!

833. If a card is drawn at random, find the probability of getting a red card or a diamond or an ace.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 872

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Hi,

Neat work!

834. A natural number is chosen at random from the first 100 natural numbers. Find the probability of the number chosen is

(a) a multiple of 2 or 5

(b) a multiple of 2 or 5 or 7.

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

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**666 bro****Member**- From: Flatland
- Registered: 2019-04-26
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*Last edited by 666 bro (2021-01-03 00:41:32)*

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Excellent!

835. From the numbers ranging from 50 - 150, an integer is chosen at random. Find the probability of the integer being divisible by 3.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 872

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Neat work!

836. If two cards are drawn at random from a set of 52 cards, find the probability of one card is a club and other is a diamond.

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

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**irspow****Member**- Registered: 2005-11-24
- Posts: 872

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,581

Neat work!

837. Two dice and three coins are thrown simultaneously. Find the probability such that there is a sum of 6 on the dice and at least two tails on the coins.

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

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**666 bro****Member**- From: Flatland
- Registered: 2019-04-26
- Posts: 621

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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