Exhibit 5-9

Multiple Choice

Exhibit 5-9.On a particular production line,the likelihood that a light bulb is defective is 5%.Ten light bulbs are randomly selected. Refer to Exhibit 5-9.What are the mean and variance of the number of defective bulbs?

A) 0.475 and 0.475
B) 0.475 and 0.6892
C) 0.50 and 0.475
D) 0.50 and 0.6892