Question

    5 coins are tossed together. What is the probability of getting exactly 3 tails?

    A 5/32 Correct Answer Incorrect Answer
    B 5/16 Correct Answer Incorrect Answer
    C 35/64 Correct Answer Incorrect Answer
    D 25/62 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    If ‘n’ fair coins are tossed, Total number of outcomes in the sample space = 2n The probability of getting exactly ‘r’ number of heads when ‘n’ coins are tossed =nCr/ 2n Therefore, probability = 5C3/25 = 5/16

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