Two unbiased coin are tossed .what is the probability of getting atmost one head?
Choose one
A) 4/5	B) 3/4	C) 4/7	D) 9/7	E) 3/4
Here S={HH,HT,TH,TT}   Let 3/4e=event of getting one head   3/4={TT,HT,TH}   P(3/4)=n(3/4)/n(S)=3/4   Ans: 3/4
<result>E</result>
Two unbiased coin are tossed .what is the probability of getting atmost one head?