Three unbased coins are tossed. the probability of getting at most three T is ?	Choose the correct answer
A) 1/2 B) 7/8 C) 3/4 D) 1/8 E) 2/3
S={TTT,TTH,THT,HTT,THH,HTH,HHT,HHH}   E be the event of getting at least two head is {TTT}   P(E)=n(E)/n(S)=1/8   Answer(1/8)
<result>D</result>
Three unbased coins are tossed. the probability of getting at most three T is ?