Some LCD panels have stuck or dead pixels that have defective transistors and ar

Question

Some LCD panels have stuck or dead pixels that have defective transistors and are permanently unlit. If a panel has too many dead pixels, it must be rejected. A manufacturer knows that, when the production line is working properly, the probability of rejecting a panel is 0.07. How many screens do they expect to reject in a day's production run of 500 screens? [Please format your answer as the expected whole number of LCD panel screens. Example 52 screens, indicate unit, but no percentage, & no decimal value.]

Explanation / Answer

probability of rejecting a panel is p= 0.07

in production run of n=500 screens

Expected value is n*p =500*0.07 =35

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