In a shipment of 11 CD players, two are defective, Find the probability that a sample...

Question

Question

In a shipment of 11 CD players, two are defective, Find the probability that a sample of 3 CD players will not contain any that are defective.

math Statistics-And-Probability

Answer 1

Answer #1

x items are selected from n items by nCx ways

Where , nCx = n! / [ (n - x)! * x! ]

Of the 11 CD players 2 are defective and remaining 9 are non-defective.

P(all 3 non-defective) = 9C3 / 11C3

= 84 / 165

= 0.5091

Answer 2

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