A card is drawn from a deck. Given it is a red card, what is the probability it is a heart?

A card is drawn from a deck. Given it is a red card, what is the probability it is a heart?

Approach: Use P(Heart | Red).

1/2. There are 26 red cards and 13 hearts.

Follow-up: What if the card is a spade?

Key concepts: Bayes' theorem.