Question

Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

Answer 1

Desirable outcome types: S H, H S.
So the Number of desired outcomes
= 13*13 + 13 * 13 = 26*13

Possible total outcomes: 52 * 51.

Probability of one card being a spade and another being a heart
= 26*13/(52*51) = 13/102.