AnswersCommon Core Algebra II - MA3111 B-ICExpected Value

Expected Value Answers

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4
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The expected value for the number of heads is .

A
0
B
0.5
C
1
D
1.5
E
2
5
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The expected value in this case means .

A
if you flip a coin twice, heads will turn up 1 time
B
after repeated trials of flipping a coin twice, the average number of times heads will turn up is 1
C
after repeated trials of flipping a coin twice, the average number of times heads will turn up is 1/2
8

The expected value of the number of points won on a spin is .

A
–0.25 points
B
0 points
C
0.5 points
D
1 point
E
1.25 points
9

Suppose you spin the carnival spinner 1,000 times. How many points would you expect to win or lose?

A
lose 500 points
B
lose 250 points
C
win 250 points
D
win 500 points
10

What is the expected value? Should you play the game?

A
3/13 points; yes, you should play the game
B
0 points; yes, the game is fair and you should play
C
–3/13 points; no, you should not play the game
11

For what expected value is a game fair?

A
E(X) < 0
B
E(X) = 0
C
E(X) = 1
D
E(X) > 0
12

A =

Answer:

1/4

13

B =

Answer:

1/2

14

C =

Answer:

1/4

15

a =

Answer:

4

16

b =

Answer:

4

17

c =

Answer:

-1

18

d =

Answer:

4

19

e =

Answer:

-1

20

f =

Answer:

4

21

g =

Answer:

-1

22

a = b = c =

Answer:

9

23

a = b = c =

Answer:

48

24

a = b = c =

Answer:

-1

25

points

Answer:

12

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