Three unbased coins are tossed. the probability of getting at most three head and three tails is ?	Choose the most appropriate option:
A) 1/2	B) 1/4	C) 3/4	D) 1/5	E) 2/3
S={TTT,TTH,THT,HTT,THH,HTH,HHT,HHH}   E be the event of getting at least two head is {TTT,HHH}   P(E)=n(E)/n(S)=2/8 = 1/4   Answer(1/4)
<result>B</result>
Three unbased coins are tossed. the probability of getting at most three head and three tails is ?