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Question

Three person's A, B and C whose salaries together are Rs. 14400 and expenditures are 80%, 85% and 75% of their salaries respectively. If their savings are in the ratio 8:9:20 , then find their respective salaires.

A
Rs.3000, Rs. 5000, Rs.6400
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B
Rs. 3400, Rs. 4800, Rs. 6200
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C
Rs. 3200, Rs. 4800, Rs. 6400
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D
Rs. 3000, Rs. 5200, Rs. 6200
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Solution

The correct option is C Rs. 3200, Rs. 4800, Rs. 6400
Total salaries of A, B and C = Rs. 14400
Let the salaries of A, B and C be Rs. x, Rs. y and Rs. z respectively.
x+y+z=14400 ......... (1)

Their spendings are 80%, 85% and 75% respectively,
Their savings are 20%, 15% and 25% respectively and also their savings are given in the ratio 8 : 9 : 20

20x10015y100=89 and 15y10025z100=920
20x15y=89x=8×159×20y=23y ...(2)

and 15y25z=920z=15×209×25y=43y..(3)

From eq. (1), (2), and (3) , we have
23y+y+43y=144009y3=14400y=Rs.144003=Rs.4800
x=23×Rs.4800=Rs.3200 and z=43×Rs.4800=Rs.6400

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