# Simple probability

Practice finding probabilities of events, such as rolling dice, drawing marbles out of a bag, and spinning spinners.

### Problem

You draw a card at random from a deck that contains 3 black cards and 7 red cards.
What is P, left parenthesis, d, r, a, w, space, a, space, b, l, a, c, k, space, c, a, r, d, right parenthesis?