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If two mixers and one T.V. cost Rs. 7000, while two T.V.s and one mixer cost Rs. 9800. The value of one T.V. is?

Rs. 2800
Rs. 2100
Rs. 4200
Rs. 8400

Correct Answer: Rs. 4200

Explanation:

2 x + y = 7000 ....(i)
x + 2 y = 9800 .....(ii)
Solving (i) and (ii), we get,
y = 4200

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