The cost of 14 keyboards and 8 mouse-pads is Rs. 26,240. What is the cost of 35 keyboards and 20 mouse-pads ?

A) Rs. 65,600

B) Rs. 58,800

C) Rs. 76,550

D) Cannot be determined

Correct answer:
A) Rs. 65,600

Description for Correct answer:
Let C.P. of 1 key board = Rs. x

C.P. of 1 mouse pad = Rs. y.

\( \Large \therefore 14x + 8y = 26240 \)

Dividing both sides by 2,

\( \Large 7x + 4y = 13120 \)

Multiplying both sides by 5,

\( \Large 35x + 20y = 65600 \)

Please provide the error details in above question

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