Question

A what are the odds in favor of drawing a black 7​ in a deck of cards?

b. What are the odds against drawing a black 7​ in a deck of cards?

Answer 1

a. 1/25

b. 25/1

Explanation:

There are 2 black 7s in a deck (7 of spades and 7 of clubs). So there are 50 cards that are not black 7s.

The odds in favor of drawing a black 7 is therefore 2/50 = 1/25.

The odds against drawing a black 7 is therefore 50/2 = 25/1.