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2 years ago

6

A bag contains 80 marbles: 40 are red, 20 are blue, and 20 are black. what is the probability of selecting a red or blue marble

at random

1 answer:

DedPeter [7]2 years ago

4 0

40 % out of 80 for red
20% out of 80 for blue

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Answer:

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Step-by-step explanation:

We are using proportions to solve this problem by putting students over adults

students 3 24

--------------- = --------------- = -------------

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Using cross products

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