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A box contains 100 red cards, 200 yellow cards and 50 blue cards. If a card is drawn at random from the box, then find the probability that it will be

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A box contains 100 red cards, 200 yellow cards and 50 blue cards. If a card is drawn at random from the box, then find the probability that it will be (i) a blue card (ii) not a yellow card (iii) neither yellow nor a blue card. Select the correct answer from above options

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Total number of all possible outcomes = total number of balls = 100+200+50+350. (i) Number of blue balls = 50. `:. ` P(getting a blue ball) = `50/350 = 1/7`. (ii) Number of balls which are not yellow = 100+50=150. ` :. ` P(getting a ball which is not yellow) = `150/350 = 3/7`. (iii) Number of balls which are neither yellow nor blue = 100. `:. ` P(getting a ball which is neither yellow nor blue) ` =(100)/(350) = 2/7`.

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