Answer:
P(not red) = 90%
Step-by-step explanation:
There are 3 red, 3 green, 15 yellow, and 9 purple marbles in all:
3 + 3 + 15 + 9 = 30
You are trying to find the probability of not obtaining a red marble. There are 3 red marbles, and 30 marbles in all. This means that there are 27 marbles that are not red. Divide 27 with 30:
27/30 = 0.9
0.9 = 90/100 = 90%
90% is your answer.
P(not red) = 90%.
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