the customer service department

The customer Service department for the Wholesale electronics outlet claims that 90% of all customer complaints are resolved to the satisfaction of the customer. In order to test this claim a random sample of 15 customers who have led complaints is selected. Let x be the number of sampled customers whose complaints were resolved to the customer's satisfaction. Assuming the claim is TRUE. a) Write the binomial formula for this situation. b) By using the binomial distribution tables nd each of the following i. P(x 5 13) ii. P(x 3 10) iii. P(x 2 14) iv. PG! 5 x s 12) it. Hit c: 9) c) Suppose that of the 15 customers, selected 9 have their complaints resolved satisfactorily, using part (b) do you believe the claim of 90% satisfaction. Explain why