Question 1082670
We need to count which are the working cards.

The face cards are = 3×4= 12 (but that includes 3 diamond cards)

The diamond card are 52/4 = 13 (but that includes 3 faced cards).

Working cards are= 12 + 13 - 3 = 22. We subtract the 3 cards that are both diamond and face card to be considered only one time.

P() = working cards/total cards = 22/52 = 11/26.

@natolino_