Question

all

Answer 1

You are dealt one card from a 52-card deck. Find the probability that you are not dealt a spade.

Answer 2

how many cards in the deck are not spades ?

Answer 3

yes

Answer 4

How many spades do we have in a deck of cards?

Answer 5

There are 13 cards of each suit. 13 spades means 52-13 = 39 non-spades. The probability is 39/52.

Or you could think of it as: there are four suits, each equally likely. The chance the first card is a spade is 1 in 4 so the chance of a non-spade is 3 in 4.