Sarthaks Test
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A jar contains 24 marbles, some 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 blueballs in the jar.

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Total number of marbles = 24

Let the total number of green marbles be x.

Then, total number of blue marbles = 24 − x

P (getting a given marble) =x/24

According to the condition given in the question,

x/24 = 2/3

\x = 16

Therefore, total number of green marbles in the jar = 16 Hence, total number of blue marbles = 24 − x = 24 − 16 = 8

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