5.24. The lifetimes of interactive computer chips produced by a certain semicond uctor manufacturer are normally distributed with parameters u 1.4 x 100 hours and o 3 x 10° hours. What is the approximate probability that a batch of 100 chips will contain at least 20 whose lifetimes are less than 1.8 x 100?

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5.24. The lifetimes of interactive computer chips produced by a certain semicond uctor manufacturer are normally distributed with parameters
u 1.4 x 100 hours and o 3 x 10° hours. What is the approximate probability that a batch of 100 chips will contain at least 20 whose
lifetimes are less than 1.8 x 100?
Transcribed Image Text:5.24. The lifetimes of interactive computer chips produced by a certain semicond uctor manufacturer are normally distributed with parameters u 1.4 x 100 hours and o 3 x 10° hours. What is the approximate probability that a batch of 100 chips will contain at least 20 whose lifetimes are less than 1.8 x 100?
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