Probability

Study Material (PDF)
Self Assesment
Study Material (PDF)
Self Assesment

Click on each question to see answer & solution.

Question No: #1

Two unbiased dice are throwing. Find the probability of getting 1 as difference of two obtained numbers.
Ans: `1/4`
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Question No: #2

If two dice are rolled, then the probability of getting one number greater than 4 is -
(a) `4/9`, (b) `7/9`, (c) `1/9`, (d) `5/6`
Ans: (c) `1/9`
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Question No: #3

A die is thrown twice. Let `A` be the event of getting multiple of 3 in 1st throwing and `B` be the event of getting total as less than 6 in two throwing. Then `P(A | B)` is -
(a) `5/19`, (b) `5/21`, (c) `5/23`, (d) `5/17`
Ans: (b) `5/21`
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Question No: #4

Two unbiased dice are thrown. What is the probability of getting sum as 8 or more of 2 obtained numbers?
Ans: `15/36`
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Question No: #5

Two unbiased dice are thrown and the sum of the numbers obtained is 8. Find the conditional probability of getting at least one 5.
Ans: `2/5`
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Question No: #6

An unbiased die is throwing 3 times. If 5 obtained in first throwing, then the probability of getting total as 16 in three throwings are --
(a) `1/18`, (b) `1/9`, (c) `1/108`, (d) `5/16`
Ans: (a) `1/18`
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Question No: #7

Three unbiased dice are thrown at a time. What is the probability of getting total as at least 6 from three obtained numbers?
Ans: `209/216`
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Question No: #8

Two unbiased dice are thrown. The probability of getting total as 7 or 12 is --
(a) `2/9`, (b) `5/9`, (c) `5/36`, (d) `7/36`

Question No: #9

Two unbiased dice are thrown. What is the probability of getting odd number from first die and multiples of 3 from second die?
Ans: `1/6`
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Question No: #10

If an unbiased die is throwing twice, then the probability of getting at least one `1` is --
(a) `25/36`, (b) `1/3`, (c) `11/36`, (d) `1/36`
Ans: (c) `11/36`
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