In a Sample of 20 Hand-Held Calculators,15 Are Known to Be

Multiple Choice

In a sample of 20 hand-held calculators,15 are known to be nonfunctional.If 7 of these calculators are selected at random,what is the probability that exactly 5 in the selection are nonfunctional? Round to the nearest thousandth.

A) 0
B) 0.714
C) 0.387
D) 0.467
E) 0.750