A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that at least six wear glasses?
A)0.850
B)0.700
C)0.200
D)0.006

Question

Quizplus · Accepted Answer

The probability of at least six adults wearing glasses can be calculated using the binomial probability formula or cumulative binomial probability tables. Since calculating each probability for exactly 6, 7, 8, 9, and 10 adults wearing glasses and summing them up is cumbersome, using a binomial probability calculator or tables is more efficient. The result is approximately 0.850, indicating a high likelihood that at least six out of ten adults over 50 in a random sample will wear glasses for driving.

A Recent Survey Found That 70% of All Adults Over