135 Belief in an afterlife. A national poll conducted by The New York Times (May 7, 2000) revealed that 80%

of Americans believe that after you die, some part of you lives on, either in a next life on earth or in heaven.

Consider a random sample of 10 Americans and count x , the number who believe in life after death.

a. Find P(x = 3) .

b. Find P(x … 7) .

c. Find P(x 7 4)