Conditional Probability

The probability that an event B will occur given that another event A has already occurred is called a ______________ ________________.

• conditional probability

• fundamental counting principle

• independent probability

• dependent probability

Consider the following table with information about all of the students taking Statistics at Happy High School.

Find P( Female | Part-time) =

• 15/31

• 43/71

• 31/43

• 15/43

P(Pizza|Senior):

• 10/20

• 4/5

• 2/3

• 10/5

P(Boy | German)

• .7273

• .4

• .16

• .22

P(French | Girl)

• 2.14

• .24

• .4

• .8571

P(Girl | Toyota)

• .525

• .4627

• .6774

• .3143

P(Sandals|Pants):

• 4/20
• 6/15
• 1/2
• 2/7

Consider the following table with information about all of the students taking Statistics at Happy High School.

P( Male | Full-time)

• 28/71

• 3/7

• 12/71

• 3/10

What percentage of males drive sports cars?

P(Sports Car | Male)

• 35%

• 16.25%

• 65%

• 25%

P(Freshmen|Female)

• 206/517

• 206/1792

• 206/751

• 512/1792