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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. If a leap year is selected at random, what is the chance that it will ...

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  2. Two dice are thrown simultaneously. Find the probability of getting si...

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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. In a game, a man wins a rupee for a six and loses a rupee for any othe...

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  5. Suppose we have four boxes A,B,C and D containing coloured marbles as ...

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  6. Suppose we have four boxes A,B,C and D containing coloured marbles as ...

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  7. Suppose we have four boxes A,B,C and D containing coloured marbles as ...

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  8. Assume that the chances of a patient having a heart attack is 40%. It ...

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  9. If each element of a second order determinant is either zero or one, w...

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  10. An electronic assembly consists of two subsystems, say, A and B. From ...

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  11. An electronic assembly consists of two subsystems, say, A and B. From ...

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  12. Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5...

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  13. If A and B are two events such that P(A) ne 0 and P(B/A) = 1, then

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  14. If P(A/B) > P(A), then which of the following is correct : :

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  15. If A and B are any two events such that : P(A) + P(B) – P(A and B) = P...

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  16. A committee of 4 students is selected at random from a group consistin...

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  17. A bag contains 5 red marbles and 3 black marbles. Three marbles are dr...

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  18. A and B throw a pair of dice alternately. A wins the game if he gets a...

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  19. Four balls are to be drawn without replacement from a box containing 8...

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  20. Find the probability that in 10 throws of a fair die a score, which is...

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