GEO Unit 5 Test Review

You spin a spinner with 6 sections: 1 yellow (Y), 1 purple (P), 1 red (R), 1 blue (B), 1 orange, and 1 green (G).

What is the sample space for one spin of this spinner?

Let event A = The animal is a bird.

Let event B = The animal can fly.

Which outcomes are in A and B?

Kellie randomly chooses a number from 1 to 12. What is the probability she chooses a number less than 7?

Let event A = The student plays basketball.

Let event B = The student plays soccer.

What is P(A or B)?

P(A) = 0.60, P(B) = 0.25, and

P(A and B) = 0.15.

What is P(A or B)?

A pet store sells mice, reptiles, and birds.

Let event A = A customer buys a mouse.

Let event B = A customer buys a bird.

What does P(A or B) = 0.35 mean in terms of this problem?

• The probability that a customer buys either a mouse or a bird is 35%.

• Buying a mouse and buying a bird are mutually exclusive events.

• The probability that a customer buys both a mouse and a bird is 35%.

• The probability that a customer buys neither a mouse nor a bird is 35%.

A marketing firm tracks data on grocery store visits. In one study, it finds that the probability that a shopper buys bread during a visit to the grocery store is 0.60, and the probability that a shopper buys cheese is 0.30.

Event A = A shopper buys bread.

Event B = A shopper buys cheese.

A and B are independent events if _____.

• the probability of buying bread and cheese is 0

• the probability of buying bread and cheese is 0.18

• the probability of buying bread or cheese is 0.90

• the probability of buying bread or cheese is 0.18

A and B are independent events. P(A) = 0.50 and P(B) = 0.30.

What is P(A and B)?

You flip two coins.

Let event A = The first coin comes up heads.

Let event B = The second coin comes up tails.

What does P(B|A) represent?

• The probability that both coins come up heads

• The probability that both coins come up tails

• The probability that the second coin comes up tails, given that the first coin comes up heads

• The probability that the first coin comes up heads, given that the second coin comes up tails

This Venn diagram shows sports played by 10 students.

Let event A = The student plays basketball.

Let event B = The student plays soccer.

What is P(A|B)?