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26-03-2018
Mathematics

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A bag of marbles contains 5 red, 10 blue, 3 yellow and 7 green marbles. lisa chooses one marble at random from the bag. what is the probability of not choosing a red marble?

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2018bbenzenhafe 2018bbenzenhafe

27-03-2018

20/25=4/5 or 80%

There are 20 non-red marbles and there are 25 total marbles

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