Question: 18. Problems with Your New Smartphone? According to TECH.CO, there are seven most common smartphone issues and there are simple fixes for most of them.

18. Problems with Your New Smartphone? According to TECH.CO, there are seven most common smartphone issues and there are simple fixes for most of them. One of the problems are phone crashes which accounted for approximately 25% of the performance issues.13 Suppose that smartphones are shipped in lots of N 550 phones. Before shipment, n510 phones are selected from a lot of N 550 phones that contains M 512 phones that will crash when tested. If there are no crashes among the 10 tested phones, the lot is shipped. If one or more crashes are observed, all 50 phones are tested.

a. What is the probability distribution for x, the number of phones that crash in the sample of n510?

b. What is the probability that the lot is shipped?

c. What is the probability that all 50 phones will be tested?

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