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10 Dec 2020, 03:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:26) correct
26%
(01:35)
wrong
based on 287
sessions
History
Date
Time
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Not Attempted Yet
In what ratio must wheat at $3.20 per kg be mixed with wheat at $2.90 per kg so that the mixture be worth $3.08 per kg?
A. 3 : 4
B. 2 : 3
C. 3 : 2
D. 4 : 3
E. 5 : 3
A. 3 : 4
B. 2 : 3
C. 3 : 2
D. 4 : 3
E. 5 : 3
10 Dec 2020, 10:39
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Bunuel
3.20__________________________________2.90
_________________3.08_________________
0.18__________________________________0.12
Or, \(18 : 12 = > 3 : 2\), Answer must be (C)
10 Dec 2020, 10:58
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By the rule of alligations, \(\frac{Q_1}{Q_2} = \frac{P_2 - P}{P - P-1}\)
Where Q1 and Q2 are the quantities of the cheaper and costlier rice
P1 and P2 are their Prices and P is the average price.
\(\frac{Q_1}{Q_2} = \frac{3.2 - 3.08}{3.08 - 2.9} = \frac{0.12}{0.18} = \frac{2}{3}\)
Since we need Q2 / Q1, the ratio is 3 : 2
Option C
Arun Kumar
Where Q1 and Q2 are the quantities of the cheaper and costlier rice
P1 and P2 are their Prices and P is the average price.
\(\frac{Q_1}{Q_2} = \frac{3.2 - 3.08}{3.08 - 2.9} = \frac{0.12}{0.18} = \frac{2}{3}\)
Since we need Q2 / Q1, the ratio is 3 : 2
Option C
Arun Kumar
