Question: 13
(Choose 1 answer)
An automobile service facility specializing in engine tune-ups knows that 45% of all tune-ups done on four
cylinder automobiles, 40% on
six-cylinder automobiles, and 15% on eight-cylinder automobiles. Let X be the number of cylinders on the next
car to be tuned. What is the probability mass function of X?
A. f(4)=0.45, f(6)=0.85, f(8)=1
B. f(4)=45, f(6)=40, f(8)=15
C. f(4)=0.45, f(6)=0.4, f(8)=0.15
D. None of the other choices is correct
