expected value & Odds

Choose an American household at random. What is the expected number of cars for that household?

• 1.75
• 1.84
• 2.00
• 2.50

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

CCSS.HSS.MD.A.3

In a certain community, 30% of households have 1 child, 43% have 2 children, and 27% have 3 children. If a household is selected at random, what is the expected number of children in that household? HINT: A Probability table may be helpful.

• 2.00
• 2.13
• 1.97
• 1.27

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

CCSS.HSS.MD.A.3

Find the expected value. READ CAREFULLY!

• 4.5
• 25.5
• 3.825
• 6.52

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

CCSS.HSS.MD.A.3

Find the expected value

• Loss of $0.875
• Loss of $2.125
• Win of $1.875
• Win of $3.125

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

CCSS.HSS.MD.A.3

A car dealer buys hybrids for $21,000 each and sells them for $24,500 each. Find his expected weekly profit.

• $2,380
• $5,355
• $8,109
• $37,485

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

The probability of getting bonus points is 5:8. Find the odds in favor of getting bonus points.

• 5/3

• 5/13

• 3/5

• 8/13

Tags

CCSS.7.SP.C.5

CCSS.7.RP.A.2

CCSS.7.RP.A.3

The odds against a customer ordering dessert are 20:3. What is the probability of a customer ordering dessert?

• 3/20

• 20/23

• 3/23

• 20/3

Tags

CCSS.7.SP.C.5

CCSS.7.RP.A.2

CCSS.7.SP.C.7

CCSS.7.RP.A.3

The odds in favor of receiving a gift are 5:16. Find the probability of Henry receiving a gift.

• 16/5

• 5/21

• None of these

• 5/16

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

The probability of the box having a toy is 6/13. What are the odds against the box having a toy?

• 7:13

• 6:7

• 7:6

• 13:6

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.1

Kevin is at a charity fundraiser and has a chance of receiving a gift. The odds in favor of receiving a gift are 6/17. Find the probability of Kevin receiving a gift.

• 6/23

• 17/23

• 17/6

• 23/6