Q34. A jar contains 24 marbles. Some are red and others are white. If a marble is drawn at random from the jar, the probability that it is red is 2/3, then the number of white marbles in the jar is:

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Q34. A jar contains 24 marbles. Some are red and others are white. If a marble is drawn at random from the jar, the probability that it is red is 2/3, then the number of white marbles in the jar is:

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(A) 10
(B) 6
(C) 8
(D) 7

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Class 10 Maths swatiqna 3 years 2021-12-28T14:02:04+00:00 2021-12-28T14:02:04+00:00 1 Answer 11 views Enlightened 0

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swatiqna Enlightened · Answer 1 · 2022-01-01T14:56:27+00:00

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2022-01-01T14:56:27+00:00 January 1, 2022 at 2:56 pm

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Answer: (C)
Explanation: Let the number of
white marbles be x.
Since only two colour marbles are
present, and total probability we
know of all the events is equal to 1.
P (white) = 1 – P (red)
x/24 = 1 – (2/3)
⇒ x/24 = 1/3
⇒ x = 8
So there are 8 white marbles.

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Q34. A jar contains 24 marbles. Some are red and others are white. If a marble is drawn at random from the jar, the probability that it is red is 2/3, then the number of white marbles in the jar is:

Q34. A jar contains 24 marbles. Some are red and others are white. If a marble is drawn at random from the jar, the probability that it is red is 2/3, then the number of white marbles in the jar is:

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