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Probability Test - 8
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Probability Test - 8
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    The probability that a man will step forward is 0.4 and and he will step backward with a probability of 0.6.

    The probability that at the end of eleven steps he is one step away from the starting point is

    Solutions

    The man is one step away from the starting point in the following two cases
    (i) The person takes 6 steps forward and 5 steps backward
    (ii) The person takes 5 steps forward and 6 steps backward

    Required probability = 11C6 ( 0.4 )6 ( 0.6 )5 + 11C5 ( 0.4 )5 ( 0.6 )6 = 0.37

     

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