Mr.Rao bought notebooks at the rate of 4 for Rs.35 and sold them at a rate of 5 for Rs.58..Then calculate, (1)his gain percentage (2) the number of notebooks he should sell to earn a profit of Rs. 171..
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Gain percent = (selling price - cost price )/cost price * 100
= (5.58 - 4.35)/4.35 * 100 = 28.27 %
profit needed = 171
let number of books be = n
profit = n * (selling price - buying price) = 171
n = 171/1.23 = 139 approx.
gain %: 171/(139 * 4.35) * 100 = 28.28 %
= (5.58 - 4.35)/4.35 * 100 = 28.27 %
profit needed = 171
let number of books be = n
profit = n * (selling price - buying price) = 171
n = 171/1.23 = 139 approx.
gain %: 171/(139 * 4.35) * 100 = 28.28 %
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