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Question

A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red ? (ii) white ? (iii) not green?

Solution
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Total number of marbles in the box =5+8+4=17
i) P(red) = no. of red marbles/total number of marbles
P(red) =517

ii) P(white) = no. of white marbles/total number of marbles
P(white) =817


iii) P(green) = no. of green marbles/total number of marbles
P(green) =417

P(not green) =1 P(green) =1317

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