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20 September, 17:16

A bag has 10 red marbles and 10 yellow marbles. Half of they yellow marbles are made of plastic. A marble is selected at random. What's the probability that it's a yellow plastic marble

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  1. 20 September, 17:34
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    5:20 because there are 10 red marbles and 10 yellow marbles which equals 20 marbles all together and half of the 10 yellow marbles are plastic so 10 divided by 2 = 5

    (1:4 if you need it simplified)
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