Two mixers and one T.V. cost Rs. 7000, while two T.V.s and a mixer cost Rs, 9800. The value of one T.V. is:  Select
A) Rs.4000	B) Rs.4500	C) Rs.4300	D) Rs.4200	E) None of these
Explanation :   Let C.P. of a mixer be Rs. x and that of a T.V. be Rs. y.   Then,   2x + y = 7000 and 2y + x = 9800.   Multiplying 2nd equatien by 2 and subtracting first from it, we get   3y = 19600 - 7000= 
<gadget id="calculator">19600 - 7000</gadget>
<output>12_600</output>
12600   or   y= 4200 C.P. of a T.V. = Rs. 4200   Answer : Rs.4200
<result>D</result>
Two mixers and one T.V. cost Rs. 7000, while two T.V.s and a mixer cost Rs, 9800. The value of one T.V. is: