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30 January, 00:22

There are red blue and black marbles in the bag

the probability of pulling out a red marbles 2/5

the probability of pulling out of black marble is 1/10

one marble is pulled out at random

what is the probability the marble will be blue

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  1. 30 January, 00:47
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    2/5 x 2 = 4/10 1/10 + 4/10 = 5/10

    5/10 - 10/10 = 5/10 The probability of the marble being blue is 5/10
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