The ones who are crazy enough to think they can change the world are the ones who do.- Steve Jobs
6.Find C.P. when S.P. = Rs.51.70 and loss = 12%
Option: B
C.P. = Rs.(100/88) * 51.70, since it is loss
C.P. = Rs.58.75
7.A person incurs 5% loss by selling a watch for Rs.1140. At what price should the watch be sold to earn 5% profit?
Option: A
Consider the new S.P. be Rs.x
then, (100 - loss%):(1st S.P.) = (100 + gain%):(2nd S.P.)
(100 - 5)/1140 = (100 + 5)/x
x = (105 * 1140)/95 = 1260
8.A book was sold for Rs.27.50 with a profit of 10%. If it were sold for Rs.25.75, then what would have been the percentage of profit?
Option: A
S.P. = Rs.27.50
Profit = 10%
then,C.P. = Rs.(100/110) * 27.50 = Rs.25
when S.P. = Rs.25.75, profit = S.P. - C.P.
profit = Rs.(25.75 - 25) = Rs.0.75
new profit% = (0.75 * 100)/25 = 3%
9.If the cost price is 96% of the selling price, then what is the profit percent?
Option: D
Consider S.P. = Rs.100
C.P. = Rs.96
profit = Rs.(100 - 96) = Rs.4
profit% = (4 * 100)/96 = 4.17%
10. The C.P. of 21 articles is equal to S.P. of 18 articles.Find the gain percent?
Option: C
Consider C.P. of each article be Re.1
then, C.P. of 18 articles = Rs.18
S.P. of 18 articles = Rs.21
gain = Rs.(21 - 18) = Rs.3
gain% = (3 * 100)/18 = 50/3%
i.e) Rs.1260
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