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A box contains 12 red marbles, 15 black marbles and 18 green marbles. One marble is picked up from the box randomly. What is the probability of getting a red or a black marble?
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A box contains 12 red marbles, 15 black marbles and 18 green marbles. One marble is picked up from the box randomly. What is the probability of getting a red or a black marble?

User Seal Blue
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7.7k points

2 Answers

0 votes
12 + 15 + 18 = 45 marbles in total
12 + 15 = 27 red/black marbles

(27)/(45) is the probability
Also 60%
Hope this helped :)

User Prince Singh
by
8.5k points
2 votes
I believe the answer is 27/45, or 60%.
User Kacy
by
8.9k points
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