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

A box has 100 pens of which 10 are defective. What is the probability that out of a sample of 5 pens drawn one by one with replacement at most one is defective ?

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
D
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KUMAR PRAKASHAN-PROBABILITY-Solutions of NCERT Exemplar Problems (Objective type Questions)
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  10. Which one is not a requirement of a binomial distribution ?

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  16. For the following probability distribution E(X^(2)) is equal to ....

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  17. Suppose a random variable X follows the binomial distribution with par...

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  18. In a college, 30% students fail in physics, 25% fail in mathematics an...

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