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Zeyad has a bag of 40 marbles. 10 of them are red. 12 are blue. 18 are white. He reaches into the bag without looking. What is the probability that Zeyad will select a white marble?

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Answer:

9/20

Step-by-step explanation:

There are 40 marbles

18 are white

P( white marble) = number of white marbles / total number of marbles

                            = 18/40  = 9/20

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