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A coin is tossed 5 times. What is the pr...

A coin is tossed 5 times. What is the probability of getting at least 3 heads.

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(i) A coin is tossed 5 times. What is the probability of getting : (a) at least 3 heads (b) at most 2 heads ( c ) no head (d) 3 heads ? (ii) If a fair coin is tossed 10 times, find the probability of : (a) exactly four heads (b) exactly six heads ( c ) at least six heads (d) at most six heads.

A coin is tossed 6 times . Find the probability of getting at least 3 heads .

Knowledge Check

  • A coin is tossed n times . If the probability of getting at least one head is greater than 0.9 then the minimum vaue of n is

    A
    3
    B
    5
    C
    4
    D
    2

  • A coin is tossed n times. The probability of getting at least one head is greater than that of getting at least two tails by 5/32. Then n is :

    A
    5
    B
    10
    C
    15
    D
    None of these

  • A coin is tossed three times. What is the probability of getting head and tail alternately?

    A
    `(1)/(8)`
    B
    `(1)/(4)`
    C
    `(1)/(2)`
    D
    `(3)/(4)`

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    A die is tossed and when 6 appears then a coin is tossed two times. What is the probability of getting two heads?

    A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head?

    A coin is tossed two times. Find the probability of getting atmost one head.

    A coin is tossed 6 times. Find the probability of getting (i) exactly 4 heads (ii) at least 1 head (iii) at most 4 heads .

    A coin is tossed three times. What is the probability of getting head and tail (HTH) or tail and head (THT) alternatively?

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