You are given three coins: one has heads on both faces, the second has tails on both faces,
and the third has a head on one face and a tail on the other. You choose a coin at random and
toss it, and it comes up heads. The probability that the other face is tails is	Choose the most appropriate option
A) 1/4
B) 1/3
C) 1/2
D) 2/3
E) 4/3
the three coins are HH LL HT   total possiblity are 6   1st head probablity are 2/6,   2 nd head probablity are 0,   third head probablity are 1/6,   The total head probablity is 2/6+0+1/6=1/2,   Then tail probablity is 1-1/2=1/2   ANSWER:1/2
<result>C</result>
You are given three coins: one has heads on both faces, the second has tails on both faces,
and the third has a head on one face and a tail on the other. You choose a coin at random and
toss it, and it comes up heads. The probability that the other face is tails is