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5.
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A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
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Answer: Option A
Explanation:
Total number of balls = (2 + 3 + 2) = 7.
Let S be the sample space.
Then, n(S)
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= Number of ways of drawing 2 balls out of 7
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= 7C2 `
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= 21.
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Let E = Event of drawing 2 balls, none of which is blue.
n(E)
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= Number of ways of drawing 2 balls out of (2 + 3) balls.
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= 5C2
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= 10.
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Title : Probability Q5
Description : 5. A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the ball...
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