Exercise 58 Page 42

When calculating probability, you are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability that a randomly chosen block is red or yellow we will use the Probability Formula. P=Favorable Outcomes/Possible OutcomesHailey has of 2 red blocks, 4 blue blocks, 3 yellow blocks, and 1 green block. The sum of these values is the number of possible outcomes. 2+4+3+1= 10 blocks Out of these, 2 are blue and 3 are yellow, which sum is the number of favorable outcomes. Now we have enough information to calculate P(red and yellow blocks).

The probability of choosing a red or block is 12, which can also be written as 1:2.