The bookstore has four red school jerseys four blue school j

The bookstore has four red school jerseys. four blue school jerseys. and five green school jerseys to choose from. If a student selects one at random, find the probability it is red or green

Solution

4 red

4 blue

5 green

P(red or green) ---> So, red + green = 4 + 5 = 9 favorable cases

Total number of jerseys is : 4 + 4 + 5 = 13

So, P(red or green) = 9 / 13 --> ANSWER