请教一道排列组合题:
Six cards numbered from 1 to 6 are placed in an empty bowl. First one
card is drawn and then put back into the bowl; then a second card is
drawn. If the cards are drawn at random and if the sum of the numbers on
the cards is 8, what is the probability that one of the two cards drawn is numbered
5?
A. 1/6 B. 1/5 C.1/3 D. 2/5
E. 2/3
答案是D,
请哪位指点如何得出？多谢！ | 
