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Question 66
Two mixers and one TV cost ₹500, while two TVs and one mixer cost ₹700. The cost of one TV is:
Solution
Let's assume the cost of one mixer and one TV is M and T respectively.
Two mixers and one TV cost ₹500.
2M+T = ₹500 Eq.(i)
While two TVs and one mixer cost ₹700.
2T+M = ₹700
M = ₹700-2T Eq.(ii)
Put Eq.(ii) in Eq.(i).
2(₹700-2T)+T = ₹500
₹1400-4T+T = ₹500
4T-T = ₹1400-₹500
3T = ₹900
T = ₹300
So the cost of one TV is ₹300.
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