How many defective lamps would you expect to find in a box

A company sells lamps, of which 15% are defective.

(a) What is the probability that in a box of 14 lamps, there will be at most 3 defectives?

(b) How many defective lamps would you expect to find in a box of 14 lamps?

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How many defective lamps would you expect to find in a box : a company sells lamps of which 15 are defective.a what is the probability that in a box of 14 lamps there will be at

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