Answers

2014-01-29T22:38:45+08:00
Probability
Heart card & Black card - 13 / no.deck of cards
Because there are 13 cards in a set of hearts, diamonds, clover, and spade.
Ace of diamonds -1 / no. of cards in a deck
There are only one ace in a set of hearts, diamonds, clover, and spade.

I play cards and I know that. ;-)
0