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A jar contains 24 marbles. Some of these are green and others are blue. If a marble is drawn at random from the jar,

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A jar contains 24 marbles. Some of these are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is 2/3. Find the number of blue marbles in the jar. Select the correct answer from above options

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Total number of marbles = 24 Let x be the number of blue marbles in the jar. P(getting a blue marble) = x/24 There are 2 types of marbles in the jar, blue and green. P(getting a blue ball) + P(getting a green ball) = 1 (Because sum of probability = 1) 2/3 + x/24 = 1 (16+3x)/24 = 1 x = 4 There are 4 blue marbles in the jar.

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