Question

32 pens are there in a box where 14 are red pens, ‘p’ 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.

A 5:2
B 4:5
C 6:7
D 7:1
E None of these
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