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Jamil1992Mehedi
A salesman makes a loss of 20% based on the selling price of an article. if the cost price is 300 dollar , what is the selling price?

(A) 120

(B) 225

(C) 240

(D) 250

(E) 280
The wrinkle here is that loss is based on sell price. Using answer choices works well here.

Sell Price - 300 = -RESULT that is 20% of Sell Price

Start with C) 240
240 - 300 = -60
\(-\frac{60}{240}=-\frac{1}{4}=-25\) percent

The percent is too high, which means the portion of the sell price, derived from subtracting 300, is too high.
So 240 is too low in relation to 300. The difference between them leaves too big a portion. Eliminate A and B. Their percentages will be even higher than 25%

Answer D or E? We need 20%. That's not far from Answer C's 25%. Try D.

D) 250 - 300 = -50
\(-\frac{50}{250}=-\frac{1}{5}=-20\) percent
That's a match

Answer D
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Jamil1992Mehedi
A salesman makes a loss of 20% based on the selling price of an article. if the cost price is 300 dollar , what is the selling price?

(A) 120

(B) 225

(C) 240

(D) 250

(E) 280

We can let the selling price = x; thus, we have

(x - 300)/x = -20/100

(x - 300)/x = -1/5

5(x - 300) = -x

5x - 1500 = -x

6x = 1500

x = 250

Answer: D
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Loss= (CP-SP)*100/SP

Putting values
20=(CP/SP -1)*100
6/5=300/SP

SP=250

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