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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

AI Generated Solution

To find the probability that both selected batteries are dead, we can follow these steps: ### Step 1: Determine the total number of batteries and the number of dead batteries. - Total batteries = 8 - Dead batteries = 3 ### Step 2: Calculate the probability of selecting the first dead battery. - The probability of selecting a dead battery first is given by the ratio of dead batteries to total batteries: ...
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NCERT EXEMPLAR ENGLISH-PROBABILITY-Objective Type Questions
  1. A bag contains 5 red and 3 blue balls. If 3 balls are drawn at random ...

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  2. A bag containing 5 red and 3 blue balls. If 3 balls are drawn at rando...

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  3. Three persons A,B and C, fire at a target in turn, starting with A. Th...

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  4. Assume that in a family, each child is equally likely to be a boy or g...

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  5. If a die is thrown and a card is selected at random from a deck of pla...

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  6. A box contains 3 orange balls, 3 green balls and 2 blue balls. Three b...

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

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

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

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  10. Which one is not a requirement of a binomial distribution? There are 2...

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  11. If two cards are drawn from a well shuffled deck of 52 playing cards w...

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  12. The probability of guessing correctly atleast 8 out of 10 answers on a...

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  13. If the probability that a person is not a swimmer is 0.3, then the pro...

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

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

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

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

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