Binomial Distribution

DiGiorno’s frozen pizza has some of the most creative and likeable advertisements on television. USA Today’s Ad Track claims that 20% of viewers like the ads “a lot.” Suppose that a sample of 400 television viewers is shown the advertisements. What is the probability that the sample will have between

a. 18% and 22% who like the ads “a lot”?

b. 16% and 24% who like the ads “a lot”?

c. 14% and 26% who like the ads “a lot”?

d. 12% and 28% who like the ads “a lot”?