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It is known that 10% of certain articles manufactured are defective. What is the probability that in a random sample of 12 such articles, 9 are defect

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It is known that 10% of certain articles manufactured are defective. What is the probability that in a random sample of 12 such articles, 9 are defective? Select the correct answer from above options

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required probability is `P(9/12) = .^12C_9(1/10)^9(9/10)^3` `= (12*11*10)/(3*2) * (1/10)^9(9/10)^3` `= 22* 9^3/10^11 ` answer

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