Three unbiased coins are tossed. What is the probability of getting at most 2 heads?	Choose the correct answer.
A) 7/8	B) 5/8	C) 3/8	D) 7/5	E) 3/5
Here S={TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}   Let E=event of getting at least two heads ={TTT, TTH, THT, HTT, THH, HTH, HHT}   P(E) = n(E)/n(S) = 7/8.   7/8nswer 7/8.
<result>A</result>
Three unbiased coins are tossed. What is the probability of getting at most 2 heads?