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23 May, 20:53

What is the probability that a randomly number from 20 to 30 is divisible by 3 and then divisible by 12 after replacing first

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  1. 23 May, 21:19
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    Probability of divisibility by3=4/11

    probability of divisibility by 12 = 1/11

    probability of divisibility by 12 and 3=4/11*1/11

    answer is 4/121
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