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Two number aa n db aer chosen at random ...

Two number `aa n db` aer chosen at random from the set of first 30 natural numbers. Find the probability that `a^2-b^2` is divisible by 3.

A

`(9)/(87)`

B

`(12)/(87)`

C

`(15)/(87)`

D

`(47)/(87)`

Text Solution

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
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  11. A coin is tossed three times. The probability of getting head and tail...

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  12. A bag contains 50 tickets numbered 1, 2, 3, .., 50 of which five are ...

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  13. One ticket is selected at random from 100 tickets numbered 00,01,02, …...

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  16. Two cards are drawn from a well shuffled deck of 52 cards.The probabil...

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