Probability and Expected Value Practice

If the expected value is negative, are you expected to win?

• yes
• no

Tags

CCSS.HSS.MD.A.2

Eva flips a coin. If she gets heads, she wins $4. If she gets tails, she loses $3. What is her expected value of a coin flip?

• $1

• $0.50

• -$0.50

• $0

Tags

CCSS.HSS.MD.B.5A

A student group sells 500 raffle tickets for $2 each. At the drawing the top prize will be a gift certificate for $100. Second prize will be a $50 gift card and there will be five 3rd prizes, each a $20 gift card. Do you expect to win or lose (on average)? How much?

• lose an average of $5.50

• lose an average of $1.50

• win an average of $2.00

• lose an average of $10.00

Tags

CCSS.HSS.MD.B.5A

The expected value of a game is...

• The amount that one can win at a game...

• The amount that one can lose at a game...

• The amount that one can win / lose at a game

• The amount that is recovered after a bet is placed

Tags

CCSS.HSS.MD.A.2

• $1.70

• $2.70

• $3.70

• $5.70

Tags

CCSS.HSS.MD.A.2

What is the Expected Value after one spin?

• 1

• 2

• 3

• 5

Tags

CCSS.HSS.MD.B.5A

What is the expected value of the spinner above?

• 1.000

• -1.125

• 2.000

• -2.500

Tags

CCSS.HSS.MD.B.5A

What is the probability that an "A" student is a male?

• 12/100

• 56/100

• 12/20

• 8/100

Tags

CCSS.HSS.CP.A.4

A fair, 6-sided dice is thrown 120 times.

Roughly how many times would you expect the number 5 to come up?

• 6

• 10

• 12

• 20

Tags

CCSS.7.SP.C.6

Sam’s pencil case contains 3 red, 2 blue and 5 black pens.

He takes a pen out without looking then puts it back 100 times.

Roughly how many times would you expect him to pick up a red pen?

• 10

• 20

• 30

• 50

Tags

CCSS.7.SP.C.6