Question
Ravi has 90 pens of two different brands i.e., Parker
and Cello. If he bought 30 more Parker pens, the ratio of number of Cello to Parker pens with him would become 3:5. Find the number of Parker pens Ravi initially had.Solution
Let the number of Cello and Parker pens with Ravi after buying 30 more pens be '3x' and '5x' respectively. ATQ: 3x + 5x = 90 + 30 8x = 120 x = 15 Number of Parker pens with Ravi after buying 30 more pens = 5x = 5 × 15 = 75 Number of Parker pens Ravi initially had = 75 – 30 = 45
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