Here ;
Let the no. of chinos sold = 10

Therefore no. of jeans sold = 3 * no. of chinos = 30

Let profit from 1 pair of jeans = $1

therefore for 30 jeans, profit = $30

and the profit for a pair of chinos = 2 * profit of jeans = 2* 1 = $2

therefore for 10 chinos, profit = $20

Now total profit = $50, out of which $20 is from the sale of chinos.

Hence percentage of profit from chinos = \(\frac{20}{50} = 40%\)
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Explanation

If all the values given in a problem and its answers are percents, ratios, or fractions of some unknown, then the problem will probably be easiest to solve by stipulating values for the unknowns.

In this problem, the two ratios given are 3 : 1 (jeans sold : chinos sold) and 2 : 1 (profits per pair of chinos : profits per pair of jeans). The easiest numbers to stipulate are:

3 pairs of jeans sold

1 pair of chinos sold

$2 profit/pair of chinos

$1 profit/pair of jeans

This yields $2 profit from the chinos out of a total $5 in profit: 2/5 = 40%

Hence option C is correct!
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C = # of chinos sold
J = # of jeans sold
J = 3C
J profit = 1*J = 1J
C profit = 2*C = 2C

Total profit: 1J + 2C
Substitute J = 3C
Total profit: (1*3C) + (2C) = 5C
Percent profit from chinos sold?
(CprofitTotalProfit∗100)=(CprofitTotalProfit∗100)=

(2C5C∗100)=.4∗100=40(2C5C∗100)=.4∗100=40 percent

Answer C

the local outlet of the Chasm sold three times as many jeans as chinos.... So \(J=3C\)
they made twice as much profit for a pair of chinos, say x, as for a pair of jeans, say y,... So x=2y
Total profit = J*y+C*x=3C*y+C*2y=5Cy
Profit from Chinos = C*X=2yC
So % = \(\frac{2Cy}{5Cy}*100=40%\)

C
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Sold ratio:
J : C = 3:1

profit ratio:
C:J = 3:1
=> J : C = 1 : 2

So, total profit = Sold Jeans X Profit of Jeans + Sold Chinos X Profit of Chinos
= 3 X 1 + 1 X 2 = 5

Percentage of profit for chinos = ( 2/5 ) X 100 = 40%