A stationer buys pens at 5 for Ruppees 28 and sells them at a profit of 25% . How much should a customer pay; if he buys I) only one pen, ii) three pens.
Answers
Step-by-step explanation:
A stationer buys 5 pens for Rs 28 and sells them at the profit of 25%. How much should a customer pay if he buys 3 pens?
Answer
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Hint: In this question, we are given the cost price and profit percentage of the pens and we have to find the selling price of the pens. We will first use the unitary method to find the cost price of one pen and then we will use the basic cost price, selling price formula which is SP=CP+ profit
where SP is selling price and CP is cost price.
Complete step by step answer:
We are given a cost price of 5 pens which is Rs 28, to simplify the sum, we will find the cost price of 1 pen by unitary method.
Cost price of 5 pens = Rs 28
Cost price of 1 pen =Rs 285=Rs 5.60
As we are given the profit percentage which is 25%, we will convert it to profit to simplify calculation.
profit=profit percentage100 × cost price
=25100 × 5.60
=1.4
As we know, selling price is equal to sum of cost price and profit. Hence,
SP=CP+ profit
SP=5.60+1.4
SP=7.00
Hence, the selling price of one pen is Rs 7
. But we have to find the selling price of 3 pens, so we will multiply Rs 7
by 3, and we will get 7×3=21
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Answer:
cost of 1 pen 7
cost of 3 pens is 21
Step-by-step explanation:
sp = cp+ profit