A fair coin is tossed repeatedly. If the tail appears on first four tosses, then the probability of the head appearing on the fifth toss is equal to

A fair coin is tossed repeatedly. If the tail appears on first four tosses, then the probability of the head appearing on the fifth toss is equal to

  1. A

    ½

  2. B

    132

  3. C

    3132

  4. D

    15

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    Solution:

    The event that the fifth toss results in a head is independent of the event that the first four tosses result in tails.
    .'. Probability of the required event = ½

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