Suppose That More Than a Decade Ago High Levels of Lead

Multiple Choice

Suppose that more than a decade ago high levels of lead in the blood put 78% of children at risk. A concerted effort was made to remove lead from the environment. Suppose, according to a survey, only 6% of children in the United States are at risk of high blood-lead levels. In a random sample of 150 children taken more than a decade ago, what is the probability that 105 or more had high blood-lead levels?

A) 0.963
B) 0.079
C) 1.000
D) 0.000