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If an unbiased coin is tossed 7 times, f...

If an unbiased coin is tossed 7 times, find the probability of obtaining 4 'Hence and 3 'Tails'.

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The correct Answer is:
`(35)/(128)`
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CHHAYA PUBLICATION-PROBABILITY-SHORT ANSWER TYPE QUESTIONS
  1. Find the chance of throwing at least 8 in single cast with two dice.

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  2. In a lot of 25 articles, 5 are defective. Four articles are drawn at r...

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  3. If an unbiased coin is tossed 7 times, find the probability of obtaini...

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  4. Eight unbiased coins are tossed at time . Show that the probabiility o...

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  5. In a family there are 4 children. Find the probability that (i) all of...

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  7. Five books on english and three books on mathematics are placed at ran...

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  10. A bag contains 10 rupee - coins, 7 fifty-paise coins and 4 twenty finv...

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  11. What is the chance that a leap year selected at random will contain 53...

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  12. Two fair dice are thrown simultaneously. The two scores are then multi...

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  13. Four one-rupee coins and three 50 paise coins are placed at random in ...

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  14. A box contains 40 envelopes of which 25 are ordinary (not meant for ai...

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  15. In a group consisting of 80 men and 30 women, 15 per cent men and 40 p...

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  16. Five Commerce and four Science students are arranged at random in a ro...

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  17. Ten balls are distributed at random among three boxes. What is the pro...

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  18. If the numbers 1,2,3….,n are arranged in a line at random what is the ...

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  19. If P(A) = (1)/(3), P(B) = (1)/(2) , P(Acap B ) = (1)/(4),find the valu...

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  20. Given that P( E) = (1)/(3), P( F) = (1)/(4) and P( E cap F ) = (1)/(6)...

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