Let the number of correct answers be X.
Number of incorrect answers = (60 ? X).
4x ? (60 ? x) = 130
=> 5x = 190
=> x = 38
Let the cost of a table and that of a chair be Rs. x and Rs, y respectively.
Then, 2x + 3y = 3500 ...(i)
and 3x + 2y = 4000 .....(ii)
solving (i) and (ii) we get x = 1000, y = 500
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