Correct Answer - Option 4 : 66%
Given:
A has 40 pens and some pencils.
He sells 60% of pencils and 70% of pens.
He has total 48 items remained with him.
Formula used:
x% of y = xy/100
Calculation:
Let number of pencils be M.
Total pens not sold by A = 40 × 30/100 = 12
Total pencils not sold by A = M × 40/100 = 2M/5
⇒ 48 = 12 + 2M/5
⇒ M = 90
Total pencils = 90
Total number of pencils sold by A = 90 × 60/100 = 54
Total number of pens sold by A = 40 × 70/100 = 28
Total items sold by A = 54 + 28 = 82
∴ Required percentage = 54/82 × 100 = 65.85%
