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Qn #1101
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Two numbers $a$ and $b$ are chosen are random from a set of the first 30 natural numbers, then the probability that $a^2 - b^2$ is divisible by 3 is
A.
47/87
B.
15/87
C.
12/87
D.
9/87
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❓ Question: Two numbers $a$ and $b$ are chosen are random from... | TANCET Group Studies | Tancet Group Studies