Math Is Fun Forum

MKNB

Guest

Probability MCQ

The Probability for selecting black card from a pack of 52 card is 1/2 true / false
The Probability for selecting female student from a class consists of 25 male and 15 female is 15/ 25  (true)
Two dice are rolled simultaneously . The probability that the sum of two number is 12 is 1/36
The likelihood of winning sussex county cricket team in the coming world cup 2016 is
An unbiased die is rolled calculate the probability that the die show a number greater than or equal to 3 is

And Part B https://www.mathisfunforum.com/viewtopic.php?id=24927

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,385

Re: Probability MCQ

Hi MKNB,

#1) True.
#2) False. The correct answer is 15/40 = 3/8.
#3) True.
#4) I have no idea of county cricket.
#5) 4/6 = 2/3.

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Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: Probability MCQ

#1 It is better to see this  https://www.quora.com/What-is-the-probability-of-selecting-a-black-card-or-a-6-from-a-deck-of-52-cards

Q.2 Total male and female = 25+15=40  so The Probability for selecting female  = 15/40

Q.3 sample space (1,1)     (1,2)    (1,3)    (1,4)    (1,5)    (1,6)
(2,1)    (2,2)    (2,3)    (2,4)    (2,5)    (2,6)
(3,1)    (3,2)    (3,3)    (3,4)    (3,5)    (3,6)
(4,1)    (4,2)    (4,3)    (4,4)    (4,5)    (4,6)
(5,1)    (5,2)    (5,3)    (5,4)    (5,5)    (5,6)
(6,1)    (6,2)    (6,3)    (6,4)    (6,5)    (6,6)
from sample you can see by adding numbers if it equals to 12 .  that is only one possibility (6,6)   so probability is 1/total

Q.5
           The sample space S (which is the set of all possible outcomes) is listed below:

S = {1,2,3,4,5,6}.  so greater than equals to  3 is    3, 4, 5 , 6 so probability is 4/6 or 2/3.

This is real explaination.

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Malik