Answer:

Explanation:
Given



Required
Probability of Red or Blue
First, it should be noted that the event described in the question are mutually exclusive or disjoint events;
Meaning that the probability of one have no effect the other;
Having said that; the Probability of Red ot Blue is as follows

Calculating




Calculating




Substitute these values in the formula given above


Take LCM


Hence, the probability of a red or blue crayon is
