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Two numbers a and b are chosen at random...

Two numbers a and b are chosen at random from the set of first 30 natural numbers. The probability that `a^(2)-b^(2)` is divisible by 3 is:

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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