Question
The cost of 2 mouse and 3 keyboard is Rs.150 and that of
3 mouse and 2 keyboard is Rs.120. Find the cost of 5 mouse and 2 keyboard?Solution
Let cost of a mouse and a keyboard be x & y respectively. As per the question, 2x + 3y = 150 3x + 2y = 120 Solving the equation, For x and y, x = Rs. 12 & y = Rs. 42 Cost of 5 mouse and 2 keyboard = 5x + 2y = 5 × 12 + 2 × 42 = Rs.144
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