According to a study done by a university student, the probability a randomly selected individual will not cover his or her mouth when sneezing is

0.267.

Suppose you sit on a bench in a mall and observe people's habits as they sneeze.(a) What is the probability that among

18

randomly observed individuals exactly

8

do not cover their mouth when sneezing?(b) What is the probability that among

18

randomly observed individuals fewer than

4

do not cover their mouth when sneezing?(c) Would you be surprised if, after observing

18

individuals, fewer than half covered their mouth when sneezing? Why?