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Please help me on this question

by sohaib_iba » Tue Jun 01, 2010 8:27 am
The ratio of the price of coffee A to coffee B is 2:3. During a certain month, a store sells coffee A and coffee B in the ratio of 4:5. If the total revenue from the sale of these two coffees is Rs 27,600. How much of the revenue was from the sale of coffee A?

A) 9,600
B) 11,040
C) 2,266
D) 18,400
E) 22,080
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by pradeepkaushal9518 » Tue Jun 01, 2010 8:37 am
answer is A

price A/price B=2/3

sales A/salesB=4/5

so 8x+15x=27600
x=1200
so A = 8x=9600
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by selango » Tue Jun 01, 2010 8:41 am
Let the price of Coffee A:B=2x:3x

Number of coffee sold=4y:5y

-->2x*4y+3x*5y=27600

23xy=27600

xy=1200

Coffee A revenue=2x*4y

8*xy=9600

option A
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