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10 Jul 2016, 08:36
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
88% (01:38) correct
12%
(02:23)
wrong
based on 118
sessions
History
Date
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A baker sold all of his donuts for a total amount of 216 pounds. If on each donut the baker made a profit of 8% of the cost, how much did it cost the baker to make all the donuts?
A. 210.
B. 200.
C. 190.
D. 180.
E. 170.
A. 210.
B. 200.
C. 190.
D. 180.
E. 170.
10 Jul 2016, 10:22
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THE CORRECT ANSWER IS B
Cost of donuts = X
Profit on one donut = 8%
Profit on all donuts is also =8% (Well, you must know why it is so !! IF you don't know then please revisist percentage chapter again.. ok ok.. i have given the explanation at the end of the solution.... understand it , if you are confused)
X+8% of X =216
1.08X=218
X=218/1.08
X=200
ANSWER IS B
WELL, let me explain why the profit on single donut and the profit on all donuts is the same 8%
We get the cost of all donuts =200
lets assume we make 10 donuts
Then one donut cost = 20$ .. right 200/10=20 $
8% profit on one donut will be = 8% of 20 = 1.60 $
1.60 $ profit on 1 donut , then profit on 10 donuts will be ===> 1.60* 10= 16 $
THIS WAS THE CASE WHEN WE CALCULATED PROFIT ON SINGLE DONUTS ONE BY ONE
NOW LETS CALCULATE PROFITS ON ALL DONUTS AT ONCE
8% of 200 (remember we just calculated that all donuts cost 200 ... see above)
so 8% of 200 ===> 16 $
See we get the same amount irrespective whether we calculate individual profit or we calculate the profit of the whole deal.
Cost of donuts = X
Profit on one donut = 8%
Profit on all donuts is also =8% (Well, you must know why it is so !! IF you don't know then please revisist percentage chapter again.. ok ok.. i have given the explanation at the end of the solution.... understand it , if you are confused)
X+8% of X =216
1.08X=218
X=218/1.08
X=200
ANSWER IS B
WELL, let me explain why the profit on single donut and the profit on all donuts is the same 8%
We get the cost of all donuts =200
lets assume we make 10 donuts
Then one donut cost = 20$ .. right 200/10=20 $
8% profit on one donut will be = 8% of 20 = 1.60 $
1.60 $ profit on 1 donut , then profit on 10 donuts will be ===> 1.60* 10= 16 $
THIS WAS THE CASE WHEN WE CALCULATED PROFIT ON SINGLE DONUTS ONE BY ONE
NOW LETS CALCULATE PROFITS ON ALL DONUTS AT ONCE
8% of 200 (remember we just calculated that all donuts cost 200 ... see above)
so 8% of 200 ===> 16 $
See we get the same amount irrespective whether we calculate individual profit or we calculate the profit of the whole deal.
Bunuel
10 Jul 2016, 11:46
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Each donut at 8% profit is equal to 8% profit on donuts x amounting to 216 pounds
108 * (cost price of donuts x) / 100 = 216
cost price of donuts x = 216 * 100 / 108
cost price of donuts x = 200
Answer B
108 * (cost price of donuts x) / 100 = 216
cost price of donuts x = 216 * 100 / 108
cost price of donuts x = 200
Answer B
