Question

How do I do this one?



A standard deck of cards has 4 suits (hearts, diamonds, spades, and clubs) each with 13 cards in it (ace -10, jack, queen, and king). The number cards are 2-10.


When drawing a card randomly from a deck, what is the probability that it will be either a diamond or a number card?


Type your answer as a fraction reduced to the simplest form, like this: 7/11

Answer 1

there are 13 diamonds and 3*9=27 other "number cards" for a total of 13 + 27 = 40

Answer 2

so reduce \[\frac{40}{52}\]

Answer 3

10/13!!!