Page 252 - Probability Demystified

FINAL EXAM 241

50. The average electric bill for the month of October in a residential area
is $72. The standard deviation is $5. If a resident of the area is
randomly selected, the probability that his or her electric bill for
the month of October is greater than $75 is

a. 27.4%
b. 42.3%
c. 72.6%
d. 88.1%

Use the payoff table for Questions 51–55.

Player B

Player A X Y
X 2 6

Y 5 8

51. If player A uses Y and Player B uses X, the payoff is
a. 2
b. 5
c. 6
d. 8

52. The optimal strategy for Player A is to use X with a probability of
8
a
21
2
b.
3
13
c.
21
1
d.
3