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There are 3 white marbles and 7 blue marbles in a bag. Jamie will randomly pick two marbles out of the bag without replacing the first one. What is the probability of Jamie picking a white marble and then a blue marble? A) 1 15 B) 21 100 C) 7 15 D) 7 30

Respuesta :

jobina15
The probability that the first choice is blue is 7/10.

If the first choice is blue and is not replaced, then the probability that the second choice is also blue is 6/9 = 2/3.

The probability that both choices are blue is the product of these two = 7/10* 2/3 = 14/30 = 7/15.

C. 7/15 is your answer.

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