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Ixl math question im very lazy and i dont understand

Ixl math question im very lazy and i dont understand-example-1

1 Answer

9 votes

Answer:

1/21

Explanation:

We start with 7 cards. The probability of picking a 4 is 1/7. Since the first card is not put back, there are 6 cards left. Of these 6 cards, there are two which have divisors of 63: 3 and 7. So the probability of picking a divisor of 63 is 2/6, which reduces to 1/3. Multiplying these probabilities gives 1/21.

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