# Answer on Calculus Question for johnson

Question #7207

james has 8 rocks CDs and 6 country CDs, he will pick one cd at random, replace it, then pick another cd at random. what is the probability that james will pick one rock cd and then a country cd?

Expert's answer

A probability to pick a rock CD at random is 8/14.

So, 13 CD left.

Then, the probability to pick a country CD is 6/13.

Answer: (8*6) / (14*13) = 42/91 ~ 0.4615

So, 13 CD left.

Then, the probability to pick a country CD is 6/13.

Answer: (8*6) / (14*13) = 42/91 ~ 0.4615

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