Question
24 pens are there in a box where 10 are red pens,
āpā are blue pens and remaining are black pens. If a pen is picked, the probability of getting blue pen is 0.25. Find the ratio of the number of blue pens and black pens.Solution
Probability of getting a blueĀ pen , => p/24 = 1/4 => p = 6 So, number of blackĀ pensĀ = 24 ā 10 ā 6 = 8 Required ratio = 6 : 8 = 3:4Ā
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