Conditional Probability

What is the probability that a student does not participate in a club given that they take sign language?

What is the probability that a randomly selected student does not do community service if they do not play sports?

What is the probability that a student has a brother given that they do not have a sister? Write your answer as a fraction

(a)  

What is the probability that a student plays a sport given that they play an instrument? Write your answer as a fraction

(a)  

What is P(not sport | Foreign language)?

• 23/37

• 14/23

• 14/37

• 3/23

A dice is tossed.

Find P(less than 5 | even number).

• 2/3

• 3/6

• 1/2

• 1/3

What is the probability that a student plays a sport or that they play an instrument? Write your answer as a fraction

(a)  

What is P(Foreign language | Sport)?

• 14/27

• 7/12

• 23/47

• 37/47

What is P(Ace given hearts)?

*convert your fraction to a percentage*

• 1.9%

• 7.7%

• 25%

• 6.3%

What is the probability of pulling an even number, given hearts and diamonds?

• 5/13

• 26/52

• 1/2

• 10/20