Charlene has 12 plastic cups. Of the 12 plastic cups, 3 were green, 4 are red, and 5 are blue. She stacks the cups into a single stack in random order. What is the probability that the cups on top of the stack is not green

Question

Mattie Mendez

Mathematics

12 August, 10:59

Charlene has 12 plastic cups. Of the 12 plastic cups, 3 were green, 4 are red, and 5 are blue. She stacks the cups into a single stack in random order. What is the probability that the cups on top of the stack is not green

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Answers (1)

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Eliza Frye · Answer 1

So we have:

12 plastic cups total

3 green

4 red, 5 blue

the probability to have a non-green cup at the top of the stack is 9 out of 12, those are the non-green cups, so:

probability = 9/12 = 0.57 = 75%