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  • A bag contained 5 red and 4 green balls. If four balls ar...
Multiple choice

A bag contained 5 red and 4 green balls. If four balls are drawn at random, then find the probability that two balls are of red and two balls are of green colour.

  1. 10/21

  2. 7/21

  3. 1/21

  4. 5/21

  5. None

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Probability = (5C2)(4C2)/9C4 = 60/126 = 10/21

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