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14 Jul 2020, 04:11
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B
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Difficulty:
55%
(hard)
Question Stats:
69% (02:40) correct
31%
(02:21)
wrong
based on 267
sessions
History
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Time
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Not Attempted Yet
A bartender wants to blend Drink A, which is D% alcohol, with Drink B, which is E% alcohol, to yield Drink C, which is F% alcohol. To make a batch of Drink C that weighs 1,000 ounces, how many ounces of Drink A must be used?
A. 1000(F - E)/(D + E)
B. 1000(F - E)/(D - E)
C. 1000(F + E)/(D - E)
D. (F - E)/(1000(D - E))
E. (F - E)(D - E)/1000
A. 1000(F - E)/(D + E)
B. 1000(F - E)/(D - E)
C. 1000(F + E)/(D - E)
D. (F - E)/(1000(D - E))
E. (F - E)(D - E)/1000
14 Jul 2020, 08:59
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D% of A + E% of B = F% of (A+B)
=> D*A + E*B = F*1000
=> D*A + E*(1000 - A) = F*1000
=> (D - E)*A = 1000(F - E)
=> A = 1000(F - E)/(D - E)
Ans: B
=> D*A + E*B = F*1000
=> D*A + E*(1000 - A) = F*1000
=> (D - E)*A = 1000(F - E)
=> A = 1000(F - E)/(D - E)
Ans: B
General Discussion
yashikaaggarwal
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14 Jul 2020, 06:14
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??? ????? ? = 600 ??????, ?????????? 10% = ?% ???????.
????? ? = 400 ?????? ?????????? 15% = ?% ???????.
????? ? ???? ???? 600*10/100+400*15/100 = 60+60 = 120 ???????? ?? 1000????? ????? ?? 12% = ?% ?? ?????.
?? ? ?????? = 600
???'? ??????.
A. 1000(F - E)/(D + E)
= 1000(12-15) /(10+15)
= 1000(-3) /25
=> -120 ????? ?? ??? ????? ?? 600 (?????????)
B. 1000(F - E)/(D - E)
= 1000(12-15) /(10-15)
= 1000(-3)/-5
=> 600 ????? ?? ????? ?? 600 (???????)
C. 1000(F + E)/(D - E)
= 1000(12+15) /(10-15)
= 1000(27) /-5
=> -5400 ????? ?? ??? ????? ?? 600 (?????????)
D. (F - E)/(1000)(D - E)
= (12-15) /1000(10-15)
= (-3) /1000(-5)
=> ????? ?? ??? ????? ?? 600 (?????????)
E. (F - E)(D - E)/1000
= (12-15) (10-15) /1000
= -3*-5/1000
= 3/200 ????? ?? ??? ????? ?? 600
?????? ?? ?
Posted from my mobile device
????? ? = 400 ?????? ?????????? 15% = ?% ???????.
????? ? ???? ???? 600*10/100+400*15/100 = 60+60 = 120 ???????? ?? 1000????? ????? ?? 12% = ?% ?? ?????.
?? ? ?????? = 600
???'? ??????.
A. 1000(F - E)/(D + E)
= 1000(12-15) /(10+15)
= 1000(-3) /25
=> -120 ????? ?? ??? ????? ?? 600 (?????????)
B. 1000(F - E)/(D - E)
= 1000(12-15) /(10-15)
= 1000(-3)/-5
=> 600 ????? ?? ????? ?? 600 (???????)
C. 1000(F + E)/(D - E)
= 1000(12+15) /(10-15)
= 1000(27) /-5
=> -5400 ????? ?? ??? ????? ?? 600 (?????????)
D. (F - E)/(1000)(D - E)
= (12-15) /1000(10-15)
= (-3) /1000(-5)
=> ????? ?? ??? ????? ?? 600 (?????????)
E. (F - E)(D - E)/1000
= (12-15) (10-15) /1000
= -3*-5/1000
= 3/200 ????? ?? ??? ????? ?? 600
?????? ?? ?
Posted from my mobile device
