## Thinking Mathematically (6th Edition)

P(E) = $\frac{no.\ of\ outcomes\ in\ favor}{Total\ no\ of\ outcomes}$ There is a total of 52 cards, so there are 52 outcomes. There are 0 cards that are both a spade and a diamond, so there are 0 favorable outcomes. P(E) = $\frac{0}{52}$ = 0