Answered

P(AB)
=
P(ANB)
P(B)
Freshmen
Sophomores
Juniors
Seniors
2.
1
3
Boys
Girts
7
5
P(Boy|Sophomore) = ? /?

PAB PANB PB Freshmen Sophomores Juniors Seniors 2 1 3 Boys Girts 7 5 PBoySophomore class=

Answer :

The answer is 10/1
There are 10 boys and 1 of them is a sophomore

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