?

AP® Statistics

Free Version

Upgrade subject to access all content

Moderate

Combining Random Variables: The McKing Challenge

APSTAT-2MYRS1

A small fry weighs $3$ ounces with a standard deviation of $0.2$ ounces and a cheeseburger weighs $5$ ounces with a standard deviation of $0.4$ ounces. Jimmy makes a heart attack bet with one of his friends that he can eat $4$ small fries and $4$ cheeseburgers in 10 minutes.

Not only do we want to know if Jimmy can accomplish this heart attack goal, but what is the total mean and standard deviation in ounces for the $4$ cheeseburgers and $4$ small fries that Jimmy is about to devour?

A

Mean = $8$ ounces
Standard Deviation = $0.80$ ounces

B

Mean = $8$ ounces
Standard Deviation = $0.89$ ounces

C

Mean = $32$ ounces
Standard Deviation = $2.4$ ounces

D

Mean = $32$ ounces
Standard Deviation = $0.80$ ounces

E

Mean = $32$ ounces
Standard Deviation = $0.89$ ounces