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The box contains tickets numbered from 1 to 20. Three tickets are drawn from the box with replacement. The probability that the largest number on the tickets is 7 is `2//19` b. `7//20` c. `1-(7//200)^3` d. none of these

A

`(2)/(19)`

B

`(7)/(20)`

C

`1-((7)/(20))^3`

D

none of these

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-DISCRETE PROBABILITY DISTRIBUTIONS-Exercise
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  6. An unbiased coin is tossed is tossed a fixed number of times. If the p...

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  7. A coin is tossed n times. The probability that head will turn up an od...

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  8. Two coins are tossed five times. The probability that an odd number of...

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  9. A six-faced dice is so biased that it is twice as likely to show an ev...

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  10. A fair coin is tossed n times. if the probability that head occurs 6 t...

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  11. An unbiased coin is tossed n times. Let X denote the number of times h...

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  12. A fair coin is tossed is fixed number of times. If the probability of ...

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  13. A carton contains 20 bulbs ,5 of which are defective. The probability ...

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  14. In a precision bombing attack, there is a 50% chance that any one bomb...

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  15. The probability of a man hitting a target is 1/4. How many times must ...

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  16. IF the mean and S.D. of binomial distribution are 20 and 4 respectivel...

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  17. The probability of India winning a test match against West Indies is 1...

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  19. The probability distribution of a random variable X is given by. {:(...

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  20. For a binimial variate X with n=6, if P(X=4)=(135)/(2^(12)) then its v...

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