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Five present of objects prepared by a ma...

Five present of objects prepared by a machine are defective . The probability that in a sample of 20 objects, 4 will be defective is

A

`.20C_(4)(29^(16))/(40^(20))`

B

`.^(20)C_(4)(19^(16))/(20^(20))`

C

`.^(10)C_(4)(19^(16))/(20^(20))`

D

`.^(20)C_(2)(30^(16))/(20^(20))`

Text Solution

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The correct Answer is:
B
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