Probability Review

A survey asked a random sample of students at school which Rugby team they supported. 64 said Broncos, 70 said Titans and 34 said Cowboys.

Determine the number of students surveyed.

• 138

• 168

• 200

• 98

A survey asked a random sample of students at school which Rugby team they supported. 64 said Broncos, 70 said Titans and 34 said Cowboys.

Calculate the probability of selecting a student that is a Cowboys fan. You do not need to reduce the fraction.

• Pr(Cowboys) = 34/168

• Pr(Cowboys) = 70/168

• Pr(Titans) = 34/168

• Pr(Cowboys) = 64/168

A survey asked a random sample of students at school which Rugby team they supported. 64 said Broncos, 70 said Titans and 34 said Cowboys.

Calculate the probability of selecting a student who is neither a Cowboys nor Broncos supporter. Do not reduce the fraction.

• Pr (Neither Cowboys/Titans) = 70/168

• Pr (Neither Cowboys/Broncos) = 134/168

• Pr (Neither Cowboys/Broncos) = 70/168

• Pr (Neither Cowboys/Titans) = 134/168

A survey was completed on how many students chose which sport.

What is the total number of students surveyed?

• 55

• 70

• 75

• 60

A survey was completed on how many students chose which sport.

Calculate the probability of selecting a student at random who chose Soccer as their sport. Reduce your fraction.

• Pr(soccer) = 25/70

• Pr(soccer) = 10/70

• Pr(soccer) = 1/7

• Pr(soccer) = 5/14

A survey was completed on how many students chose which sport.

Calculate the probability of selecting a student at random who chose neither Baseball nor Swimming as their sport. Reduce your fraction

• Pr(Neither Baseball/Swimming) = 35/70

• Pr(Neither Baseball/Swimming) = 30/70

• Pr(Neither Baseball/Swimming) = 3/7

• Pr(Neither Baseball/Swimming) = 1/2

In an experiment, a card is selected from a standard deck with its suit being noted and six-sided die is rolled.

Calculate the probability of rolling an odd number and selecting a heart. Do not reduce the fraction.

• Pr(odd + heart) = 3/36

• Pr(odd + heart) = 9/24

• Pr(odd + heart) = 6/24

• Pr(odd + heart) = 3/24

In an experiment, a card is selected from a standard deck with its suit being noted and six-sided die is rolled.

Calculate the probability of getting a 5 OR obtaining a club. Do not reduce the fraction.

• Pr(5 or club) = 9/24

• Pr(5 or club) = 10/24

• Pr(5 or club) = 8/24

• Pr(5 or club) = 10/16

Sasha conducts an experiment where she rolls a six-sided die 12 times.

List the sample space (S).

• S = {H, S, C, D}

• S = {1, 2, 3, 4, 5, 6}

• S = {2, 4, 6)

• S = {1, 3, 5)

Sasha conducts an experiment where she rolls a six-sided die 12 times.

He ended up rolling a 4 a total of five times. Is this above or below what was expected?

• exactly what was expected

• below

• above