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A flashlight has 8 batteries out of whic...

A flashlight has 8 batteries out of which 3 are dead. If two batteries selected without replacement and tested, then probability that both are dead is

A

`33/56`

B

`9/64`

C

`1/14`

D

`3/28`

Text Solution

Verified by Experts

Required probability=`P_(D)cdotP_(D)=3/8cdot2/7=3/28`
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NCERT EXEMPLAR-PROBABILITY-Probability
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  2. A box contains 3 orange balls, 3 green balls and 2 blue balls. Three b...

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  3. A flashlight has 8 batteries out of which 3 are dead. If two batteries...

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  4. If eight coins are tossed together, then the probability of getting ex...

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  5. Two dice are thrown. If it is known that the sum of numbers on the dic...

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  6. Which one is not a requirement of a binomial distribution?

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  10. The probability distribution of a discrete random variable X is given ...

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  11. For the following probability distribution. E(X) is equal to

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

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

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  14. In a college, 30% students fail in physics, 25% fail in Mathematics an...

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  15. A and B are two students. Their chances of solving a problem correctly...

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  16. If a box has 100 pens of which 10 are defective, then what is the prob...

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  17. If P(A)gt0 and P(B)gt0. Then A and B can be both mutually exclusive an...

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  18. If A and B are independent events, then A' and B' are also independen...

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  19. If A and B are mutually exclusive events, then they will be independen...

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  20. Two independent events are always mutually exclusive.

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