Question
Ravi purchased 6 notebooks, 18 markers, and 12
highlighters for Rs. 240, Rs. 1080, and Rs. 360, respectively, from a seller. By selling each notebook and each marker, the seller made a profit of βc%β and βd%β, respectively, such that d = 2c. Find the profit earned by the seller on selling all the highlighters given the condition that the cost price of a marker, a notebook, and a highlighter is the same.Solution
According to the question Let the cost price of each notebook, each marker, and each highlighter be Rs. βyβ Selling price of each notebook = (240/6) = Rs. 40 Selling price of each marker = (1080/18) = Rs. 60 According to the question, (40βy)/yΓ100=cβ¦β¦ (I) Also, (60βy)/yΓ100=dβ¦β¦ (II) Dividing equation (I) by (II), we get (40βy)/(60βy)=c/d Or, (40βy)/(60βy)=c/2c Or, 80yβ2y=60βy Or, y=20 Therefore, the cost price of all the highlighters = Rs. 12y = Rs. 240 Required profit = 360 β 240 = Rs.120
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