Question: Apple Inc. guarantees that iPhones will not have any type of malfunctioning for one year. Suppose 90% of the iPhones operate without any malfunction for

Apple Inc. guarantees that iPhones will not have any type of malfunctioning for one year. Suppose 90% of the iPhones operatewithout any malfunctionfor one year. Suppose I take arandom sample(this means you can assume they are independent) of 80 iPhones and count the number of defectives. If X is the number ofdefectivesin the sample of 80 iPhones;

What is the probability thatno more than 4of the sampled iPhones will be defectives? Use the exact distribution for your calculations not an approximation.

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