Question

there are 7 yellow marbles, 8 red marbles, and 13 blue marbles in a bag. if you reach into the bag and pull out one marble, what is the probability that you will either get a yellow or blue marble?

Answer 1

• 5/7 or 71.4%

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Total marbles:

• 7 + 8 + 13 = 28

Number of either yellow or blue:

• 7 + 13 = 20

Probability of yellow or blue:

• P = number of yellow or blue / total number

• P = 20/28 = 5/7 or 71.4%