219. Approximate the following binomial probabilities by the use of normal approximation. Eight percent of customers
of a bank keep a minimum balance of $500 in their checking accounts. What is the probability that in a random
sample of 100 customers
a. exactly 6 keep the minimum balance of $500?
b. exactly 11 keep the minimum balance of $500?
c. 6 or fewer keep the minimum balance of $500?