Suppose I purchased 110 books
? C.P. = Rs. (10/11) x 110 = Rs. 100
? S.P. = Rs. (11/10) x 110 = Rs. 121
? Gain % = 21%
Suppose he buys 10 lemons
? C.P. = Rs. 10/2 = Rs. 5,
? S.P. = Rs. (3/5 x 10)% = Rs. 6
? Gain % = (1/5) x 100% = 20%
? Gain = (S.P. of 100 bananas) - (C.P. of 100 bananas)
? (S.P.of 20) = (S.P of 100) - (C.P. of 100)
? S.P.of 80 = C.P. of 100
Let C.P. of each banana = Re. 1
C.P. of 80 banana = Rs. 80
S.P. of 80 banana = Rs. 100
? Gain % = (20 / 80) x 100 % = 25%
Let the S.P. be Rs. P
Then, C.P. paid by subhash = Rs. (9 x P)/10
S.P. received by subhash = (108% of Rs. P) = Rs. (27 x P) / 25
? Gain = Rs.(27 x P) / 25 - (9 x P) / 10 = Rs. (9 x P) / 50
Hence, Gain% = (9P / 50) x (10P / 9) x 100 % = 20%
Let the original cost of each cooker be Re. 1 and let the number sold originally be 100.
Total sale proceeds = Rs. (100 x 1) = Rs. 100
New rate = (115% of Re. 1 ) = Rs . 1.15
Number sold now = 85
? Sale proceed now = Rs. (1.15 x 85) = Rs. 97.75
So, there is a decrease of 2.25% in the money receipt.
Let the C.P. be Rs. x
Then, S.P. when gain is 12% = 12x / 100
? 112x / 100 - 88x / 100 = 6
? 24x / 100 = 6
? x = 600 / 24 = Rs. 25
Let C.P. = Rs. P
S.P. = (C.P.) - (Loos) = P - P/7 = Rs. 6P/7
? 6P / 7 = 144
? P = (144 x 7) / 6 = Rs. 168
Hence, no Loss and no gain.
C.P. of 150 calculators = 150 x 250 = Rs. 37500
? Total C.P. = 37500 + 2500 = Rs. 40000
Marked price of 150 calculator = 150 x 320 = Rs. 48000
Selling price after discount = 48000 x 95 / 100 = Rs. 45600
? percentage profit = [(45600 - 40000) / 40000] x 100 = 14%
Let the marked price be Rs. x
Discount available by the retailer = 15% of Rs. x
? C.P. of the machine by the retailer = (x - 15% of x) = Rs. 17x / 20
So, 15% of 17x / 20 = 1955 - 17x / 20
? 51x/400 + 17x/20 = 1955
or x = 2000
? Discount received by retailer = (15% of 2000) = Rs. 300
Let the printed price of the book be Rs. 100.
After a discount of 10%, S.P. = Rs. 90
Profit earned = 12%
? C.P. of the book = Rs. (100 / 112) x 90 = Rs. 1125 / 14
Hence, (C.P.) : (printed price) = (1125 / 14) : 100 = 45 : 56
Suppose he buys 12 oranges. Then S.P. = Re. 1
Now, 80 : 1 : : 120 : R
? R = (1 x 120) / 80 = 3/2
? For Rs. 3/2, oranges sold = 12
For Re. 1 oranges sold = (12 x 2) / 3 = 8
So, he must sell them at 8 for a rupee.
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