An experiment consists of drawing 1 card from a standard 52-card deck. Let E be the event that the card drawn is a 10. Find P (E').

The are 4 different possibilities to draw a ten, namely a ten of the four different suits. The probability of the event is the ratio of the 4 possibilities and the total number of possible choices, whcih is 52:

P (E) = 4/52 = 1/13 or about 7.7%