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    If two mixers and one T.V cost Rs. 700. While two T.V s and one mixer cost Rs. 980. The value of one T.V is:
    Question

    If two mixers and one T.V cost Rs. 700. While two T.V s and one mixer cost Rs. 980. The value of one T.V is:

    A.

    Rs.480

    B.

    Rs.420

    C.

    Rs.400

    D.

    Rs.450

    Correct option is B

    Given:
    The cost of two mixers and one TV is Rs. 700.
    The cost of two TVs and one mixer is Rs. 980
    Solution:  
    Let the Cost of one mixer be M, and  Cost of one TV be T.
    Cost of 2M  +  1T = 700 --- (I)
    And cost of 2T + 1M  = 980 --- (II)
    Add both the equation
    3M + 3T = 1680
    1M + 1T = 560 --- (III)
    Subtract eq II and eq III
    1T = 420 
    Thus, the Cost price of 1 TV is Rs. 420

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