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प्रश्न
By selling 90 ball pens for Rs 160 a person loses 20%. How many ball pens should be sold for Rs 96 so as to have a profit of 20%?
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उत्तर
\[\text { S . P of 90 ball pens = Rs . 160 }\]
\[\text { Loss = 20 % } \]
\[\text{Therefore, C . P = SP }\left( \frac{100}{100 -\text { loss % }} \right)\]
\[CP = \frac{100}{100 - 20} \times 160\]
\[ = \frac{16000}{80}\]
\[ = Rs . 200\]
\[\text { Now, } \]
\[\text { S . P of 90 ball pens = Rs . 96 }\]
\[\text { Profit = 20 % } \]
\[ \text { C . P = SP }\left( \frac{100}{100 + \text { Profit % }} \right)\]
\[CP = \frac{100}{100 + 20} \times 96\]
\[ = \frac{9600}{120}\]
\[ = \text { Rs . 80 }\]
\[\text { Rs . 200 is the C . P of 90 ball pens } . \]
\[\text { Therefore, Rs . 80 is the C . P of } = \frac{90 \times 80}{200} = \text { 36 ball pens }\]
\[\text { Thus, 36 ball pens should be sold at Rs . 96 to earn a profit of 20 % }.\]
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If the selling price of 10 rulers is the same as the cost price of 15 rulers, then find the profit percentage
Some articles are bought at 2 for ₹ 15 and sold at 3 for ₹ 25. Find the gain percentage
Fill up the appropriate boxes in the following table.
| SI. No | C.P. in ₹ |
M.P. in ₹ |
S.P. in ₹ |
Discount in ₹ |
Profit in ₹ |
Loss in ₹ |
| (i) | 110 | 130 | Nil | |||
| (ii) | 110 | 130 | 10 | |||
| (iii) | 110 | 130 | 30 | |||
| (iv) | 110 | 120 | Nil | 10 | ||
| (v) | 120 | 10 | 20 | Nil |
Amutha marked her home product of pickle as ₹ 300 per pack. But she sold it for only ₹ 275 per pack. What was the discount offered by her per pack?
John sells a bat for ₹ 75 and suffers a loss of ₹ 8. The cost price of the bat is ______.
Aahuti purchased a house for ₹ 50,59,700 and spent ₹ 40300 on its repairs. To make a profit of 5%, she should sell the house for ₹ ______.
