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The probability of a bomb hitting a brid...

The probability of a bomb hitting a bridge is `1/2` and two direct hits are needed to destroy it. The least number of bombs required so that the probability of the bridge being destroyed is greater than 0.9, is :

A

8

B

7

C

6

D

9

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The correct Answer is:
B
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AAKASH INSTITUTE-PROBABILITY-ASSIGNMENT (SECTION - A Competition Level Questions)
  1. If three dice are thrown together, then the probability of getting 5 o...

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  2. In binomial probability distribution, mean is 3 and standard deviation...

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  3. The probability of a bomb hitting a bridge is 1/2 and two direct hits...

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  4. In a simultaneous toss of four coins, the probability of getting exact...

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  5. A die is tossed twice. Getting a number greater than 4 is considered a...

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  6. A biased coin with probability P,(0 < p ,1) of heads is tossed unitl a...

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  7. If two coins are tossed five times, thenthe probability of getting 5 h...

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  8. A die is thrown 100 times, getting an even number is considered a succ...

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  9. A contest consist of predicting the result win, draw or defeat of 7 fo...

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  10. In a bag there are three tickets numbered 1,2,3. A ticket is drawn at ...

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  11. Assuming that for a husband-wife couple the chance of their child bei...

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  12. A bag contains 2 white &4 black balls. A ball is drawn 5 times, each b...

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  13. In a binomial distribution the probability of getting a success is 1/4...

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  14. If X follows a binomial distribution with parameters n=100 and p = 1/...

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  15. If X has binomial distribution with mean np and variance npq, then (P(...

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  16. In a box containing 100 eggs 10 eggs are roten the probability that ou...

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  17. If a die is thrown 7 times, then the probability of obtaining 5 exactl...

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  18. A die is thrown 10 times. If getting an even number is considered as a...

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  19. In a binomial distribution, the mean is 4 and variance is 3. Then its ...

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  20. A coin is tossed successively three times. The probability of getting ...

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