Let original price = Rs. 100
Price after 1 st discount = Rs. 90
Price after 2 nd discount = Rs. (80/100) x 90 = Rs. 72
Price after 3 rd discount = Rs. (60/100) x 72 = Rs. 43.20
? Single equivalent discount = (100 - 43.20) = 56.8%
Let C.P.be Rs. x then, x - 270 = 10% of x = x / 10
? x = 300
2 x + y = 7000 ....(i)
x + 2y = 4250 .....(ii)
Solving (i) and (ii) we get,
x = 3250
? Cost of T.V. set is Rs. 3250.
Suppose he sells x oranges
Then, C.P.of x oranges = Rs. 2x/3
S.P. of x oranges = Rs. x
Profit on x oranges = Rs. (x - 2x/3) = Rs. x/3
? x/3 = 10 ? x = 30
C.P. of 60 kg mix = Rs. (25 x 6 + 35 x 7) = Rs. 395
S.P. of 60 kg mix = Rs. (60 x 6.75) = Rs. 405
Gain = Rs. (405 - 395) = Rs. 10
Let the selling price of the article = Rs. 100
? Profit = Rs. 26
? Cost price of the article = 100 - 26 = Rs. 74
? Required % = (34 x 74)/100 = 25.16%
Let S.P. = Rs. 100
Then C.P. = Rs. 40
? Required percent = (100/40) x 100% = 250%
Suppose he buys 8 toffees
Then, C.P. = Re. 1
Gain = 60%
? S.P. = Rs. (160 / 100 x 1) = Rs. 8 / 5
For Rs. 8 / 5, toffees sold = 8
For Re. 1 toffees sold = (8 x 5) / 8 = 5
So, he must sell them at 5 for a rupee
C.P. of 330 boxes = Rs. (7200 + 200 + 600) = Rs.8000
S.P. of 330 boxes = Rs. (330 x 28) = Rs. 9240
? Gain % = (1240 / 8000) x 100 % = 15.5%
Let original of each toy be Rs. 100 and number originally sold be 100.
? originaly sale proceeds = Rs. (100 x 100) = Rs. 10000
New sale proceeds = Rs. (120 x 85) = Rs. 10200
? Increase% = (200 x 100 / 10000)% = 2%
Gain% = {Error / (True value - Error)} x 100 %
= (100/900) x 100) %
= 111/9%
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