math

At the first tri-city meeting there are 8 people from town A, 7 people from town b and 5 people from town c. If a council consisting of 5 people is randomly selected, find the probability that 3 are from town A and 2 from town b.

I know that the probability for town A is 3/8 and for town B it is 2/7

how do I figure out that the answer is either of these?
a.23/1000
b. 9/150
c. 9/125
d. 49/6460

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