(a) A man purchased 180 copies of a book at N250.00 each. He sold y copies at N300.00 each and the rest at a discount of 5 kobo in the Naira of the cost pri...

Answer Details

(a) Total cost 180 x 250

=N45,000.00

Total selling price = 300y + (180-y) x 250 x 95100 $\frac{95}{100}$

300y + 42750 -237.5y

= 62.5y + 42750

Profit =  62.5y + 42750 -4500

7125 = 62.5y - 2250

9375 = 62.5y

y = 150

(b)) Profit = x220−33x $\frac{{\mathrm{<br>}}^{}}{}<br>$ (24x+ 103)

 9x - x220 $\frac{{\mathrm{<br>}}^{}}{}$ - 103

(ii) Cost = 24(20) +103 = 583.00

Selling Price =33(20) -  20220 $\frac{{\mathrm{<br>}}^{}}{}$ = 640

Percentage profit = 640−583583 $\frac{\mathrm{<br>}}{}$ x 100%

= 9.78%