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If a box has 100 pens of which 10 are de...

If a box has 100 pens of which 10 are defective, then what is the probability that out of a sample of 5 pens drawn one by one with replacement atmost one is defective?

A

`((9)/(10))^(5)`

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
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