Question

A ball is draw at random form a box containing 6 red balls, 4 white balls and 5 blue balls. what is the probability that the ball drawn is (1)red (2)white (3)blue (4)red or blue

Answer 1

1. red balls over total = ?

2. white balls over total = ?

3. blue balls over total = ?

4. 1 + 3 = ?