Pablo plays 3 rounds of a game, in which his chances of winning each round are 1/7, 1/2, and 1/n, respectively. If n ≠ 0, what is the probability that Pablo wins the first two rounds, but loses the third?	Select the correct option
A) 1/21n	B) (n-1)/14n	C) 1/7n	D) (n+2)/72n	E) (3n-2)/2n
1/7 * 1/2 * (1-1/n)   = 1/14 * (n-1)/n   = (n-1)/14n   Answer - (n-1)/14n
<result>B</result>
Pablo plays 3 rounds of a game, in which his chances of winning each round are 1/7, 1/2, and 1/n, respectively. If n ≠ 0, what is the probability that Pablo wins the first two rounds, but loses the third?