Suppose we are interested in analyzing how many customers will spend over $50 at a

certain retailer. Past data reveals that 10% of customers spend over $50. There are currently 10

customers shopping in the store.

(a) Compute the probability that none of these 10 customers spend over $50.

(b) Compute the probability that of the 10 customers, less than 2 customers spend over $50 or

more than 8 customers spend over $50.

(c) Compute the probability that 10% of these 10 customers spend over $50.

(d) Compute the probability that all 10 customers spend over $50 if we can already see that at

least 8 of the customers will spend over $50.