SOLUTION: The probability that I find defective bulb in a supermarket display is 0.25. Suppose I inspect 16 bulbs, a) What is the probability of finding 4 defective bulbs? b) What is t

Question 1137176: The probability that I find defective bulb in a supermarket display is 0.25. Suppose I inspect 16 bulbs,
a) What is the probability of finding 4 defective bulbs?
b) What is the probability of finding less than 2 defective bulbs?
c) How many bulbs do I expect to be defective?
d) Find the variance of defective bulbs
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

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a)
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b) Less than 2 would be 0 or 1,

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c) Highest probability occurs with .
From another direction, for a binomial distribution,

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d) For a binomial distribution,

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