6. The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper is normally distributed with a population mean of 320 and a population standard deviation of 20 inches. For a randomly chosen Monday, what is the probability that there will be less than 340 column inches of classified advertisement? Answer as a probability to two decimal places.

Answer: ______

9. If two events are collectively exhaustive, what is the probability that both occur at the same time?

A) 0

B) 0.50

C) 1.00

D) Cannot be determined from the information given.

Select one:

D

C

B

A

8. If two events are mutually exclusive, what is the probability that both occur at the same time?

A) 0

B) 0.50

C) 1.00

D) Cannot be determined from the information given

Select one:

B

A

C

D

7. A recent survey revealed that an American's Christmas spending averaged $830. Use this as the population mean American's Christmas spending. Suppose Americans' Christmas spending is normally distributed with a standard deviation of $120.

What percentage of Americans will spend between $1,100 and $600 on Christmas?

Answer as a probability to two decimal places.

Answer: