Question 61

A student purchased a computer system and a colour printer. If he sold the computer system at 10% loss and the colour printer at 20% gain, ho would not lose anything. But if he sells the computer system at 5% gain and the colour printer at 15% loss, he would lose 2 800 in the bargain. How much did he pay for the colour printer?

Solution

Cost Price. of comp. system = Rs. A

Cost Price of color printer = Rs. B

0.9 A + 1.2 B = A + B

0.2 B = 0.1 A

A = 2B

(A+ B) - (1.05A + 0.85B) = 800

(2B + B) - (2.10B + 0.85 B) = 800

3B - 2.95 B = 800

0.05 B = 800

B = 800/5 x 100

= 16, 000

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