A fast food franchise has data indicating that 22% of drive-thru customers will

Question

A fast food franchise has data indicating that 22% of drive-thru customers will try a particular new product if the attendant mentions the product to the customer. Use this information to solve parts a), b) and c) below. (Show the formulas and values that you use. Round your answers to four decimal places if necessary.) If 20 drive-thru customers are randomly selected, find the probability that exactly 9 of them will try the new product. (Use the Binomial Formula. Round your answer to four decimal places.)

Explanation / Answer

The probability that exactly 9 among 20 selected persons will try the new product is:

20C9*0.22^9*(1-0.22)^(20-9)

=0.013

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