Prob of being short-haired is .8, and a short-haired student will end up at a big firm 90% of the time

Prob of being short-haired is .8, and a short-haired student will end up at a big firm 90% of the time. The prob of being both short-hairded and working at a small firm is .08.

19.

Additionally, suppose the probability of working at a big firm is .75. Then, amongst the

Small firm students, the probability of being Long-haired is __.

1. 17

2. 25

3. 40

4. 54

5. 68