Two unbiased coin are tossed .what is the probability of getting atmost one head?
Answers:  A) 3/6  B) 2/3  C) 3/4  D) 1/4  E) 1/6
Here S={HH,HT,TH,TT}   Let Ee=event of getting one head   E={TT,HT,TH}   P(E)=n(E)/n(S)=3/4   Option 3/4
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Two unbiased coin are tossed .what is the probability of getting atmost one head?