Discussion :: Probability
- A box contains 2 red, 3 green, and 2 blue balls. What is the probability that none of the balls drawn is blue?
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Answer : Option B
Explanation :
Total number of balls = (2+3+2) = 7
Let S be the sample space.
Then, n (S) = the total number of ways of drawing two balls out of 7:
= 7C2
Let E is the event of drawing 2 balls, none of which is blue.
n (E) = number of ways of drawing 2 balls out of (2+3) balls.
= 5C2
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