Probability Cards

Question

A card is picked from a standard deck of 52 cards. Determine the odds against and the odds in favor of selecting a 2.

The odds against selecting a 2 are ?:?

The odds in favor of selecting a 2 are ?:?

Answer 1

The odds against are the number of failures to the number of successes. There are 4 twos (so 4 successes) and there are 48 cards that are not two (48 failures) so the odds against are 48:4 or 12:1

The odds in favor are the number of successes to the number of failures so 4:48 or 1:12