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When a coin is tossed n times, if the pr...

When a coin is tossed n times, if the probability for getting 6 heads is equal to the probability of getting 8 heads, then the value of n is

A

10

B

12

C

14

D

20

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-RANDOM VARIABLE -EXERCISE - II
  1. A coin is tossed any number of times until a head appears. If x donote...

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  2. A fair coin is tossed n times. Let x be random variable denoting the n...

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  3. When a coin is tossed n times, if the probability for getting 6 heads ...

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  4. One hundred identical coins each with probability p showing up heads a...

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  5. A die is rolled 3 times. If getting a one is considered as a success, ...

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  6. An unbiased die is tossed 6 times. The mean of number odd numbers is

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  7. In a binomial distribution B(n,p=(1)/(4)), if the probability of at le...

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  8. A die is thrown (2n + 1) times. The probability of getting 1 or 3 or 4...

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  9. If X is a binomial variate with n = 7 and P(X=3)=P(X=4) then P(X=5)=

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  10. For a binomial variate X with n=6, if P(X=2)=9P(X=4), then its varianc...

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  11. The probability that a candidate seeure a seat in Engineering through ...

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  12. The probability that a bomb dropped from a plane strikes the target i...

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  13. An experiment succeeds twice as often as it fails. The probability of ...

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  14. In an average , rain falls on 12 days in every 30 days. The probabilit...

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  15. Suppose A and B are two equally strong table tennis players . The prob...

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  16. The probability that a man can hit a target is 3//4. He makes 5 trials...

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  17. A box contains tickets numbered from 1 to 20. If 3 tickets are drawn o...

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  18. If on an average 1 vessel in every 10 is wrecked, the chance that out ...

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  19. One in 9 ships is likely to be wrecked , when they are set on sail. Wh...

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  20. The probability of happening of an event in a trial is 0.5. The probab...

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