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A box has 100 pens of which 10 are defec...

A box has 100 pens of which 10 are defective. The probability that out of a sample of 5 pens drawn one by one with replacement and atmost one is defective is

A

`a.(9)/(10)`

B

b. `(1)/(2)((9)/(10))^(4)`

C

c.`((9)/(10))^(5)+(1)/(2)((9)/(10))^(4)`

D

d.`(1)/(2)((9)/(10))^(5)`

Text Solution

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The correct Answer is:
C
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