Three unbiased coins are tossed, what is the probability of getting at least 2 tails ?
A.
B.
C.
D.
Correct Answer :
C.
Total cases are = 2*2*2 = 8, which are as follows [TTT, HHH, TTH, THT, HTT, THH, HTH, HHT] Favoured cases are = [TTH, THT, HTT, TTT] = 4 So required probability =
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