Question
48 pens are there in a box where 22 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/48 = 1/4 => p = 12 So, number of blackĀ pensĀ = 48 ā 22 ā 12 = 14 Required ratio = 12 : 14 = 6:7
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