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How many times must a man toss a fair coin so that the probability of getting at least one head is more than 90%?

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MODERN PUBLICATION-PROBABILITY-EXERCISE
  1. A die is thrown again and again until three sixes are obtained. Find t...

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  2. An experiment succeeds twice as often as it fails. Find the probabilit...

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  3. How many times must a man toss a fair coin so that the probability of ...

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  4. Fit a binomial distribution to the following data: .

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  5. A man takes a step forward woth probability 0.4 and backward woth prob...

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  6. Out of (2n+1) tickets consecutively numbered, three are drawn at rando...

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  7. If A and B are mutually exclusive, then P(AnnB) is equal to .

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  8. Let E and F be events with P(E)=3/5, P(F)=3/10 and P (E cap F)=1/5. Ar...

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  9. If A and B are two independent events such that P(A)=5/13, P(B)=2/13, ...

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  10. A pair of dice is tossed once and X denotes the sum of numbers that ap...

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  11. A die is tossed thrice. Find the probability of getting an odd number ...

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  12. Write the formula of Bayes' Theorem with its conditions.

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  13. The mean of the number of heads in the two tosses of a coin is .

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  14. Obtain binomial distribution, if : n=6, p=1/3.Find the mean

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  15. Suppose X has a probability distribution B(6,1/2). find which value of...

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  16. If the mean and variance of a binomial distribution are 9 and 6 respec...

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  17. If P(A) = 1/2, P(B) = 0, P(A//B) is :

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  18. If A and B are events such that P(A/B)=P(B/A), then

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  19. The probability of obtaining an even prime number on each die, when a ...

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  20. Two events A and B will be independent, if:

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