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  1.  Two unbiased coins are tossed. What is probability of getting at most one tail ?

    2. A.

    1/2
    B.

    2/3
    C.

    3/2
    D.

    3/4

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    Answer : Option D

    Explanation :

    Total 4 cases = [HH, TT, TH, HT]
    Favourable cases = [HH, TH, HT] 
    Please note we need atmost one tail, not atleast one tail.

    So probability = 3/4

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