Conditional Probability Review

P(crew∣did not survive) =

• P(crew ∩ did not survive)

• P(crew)/P(did not survive)

• P(crew ∩ did not survive)/P(crew)

• P(crew ∩ did not survive)/P(did not survive)

Given P(A) = .8 and P( B| A) = .3, find P( A and B).

• 2.6

• .12

• .24

• .38

What is P(Red given blue)?

• 50%

• 26.7%

• 57.1%

• 46.7%

Find P( Full-time | Male)

• 7/3

• 3/10

• 3/7

• 4/7

What percentage of those that died on the titanic were crew members?

• P(crew∣did not survive)

• P(did not survive∣crew)

• P(did not survive)

• P(crew)

P(Shorts and Shoes):

• 1/6

• 6/16

• 22/16

• 6/22

P(Freshman or Pizza):

• 27/50

• 4/50

• 3/50

• 2/11

P(Sandals):

• 16/22

• 20/36

• 5/9

• 20/16

What is P(Foreign language | Sport)?

• 14/27

• 7/12

• 23/47

• 37/47