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It is given that 10% of the electric bul...

It is given that 10% of the electric bulbs manufactured by a company are defective. In a sample of 20 bulbs, find the probability that more than 2 are defective.

Text Solution

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The correct Answer is:
`sum_(K=3)^(20) ""^(20)C_(k) (9^(20-k))/(10^(20))`
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