A book dealer bought 100 books for $1250. If she sold 30% of these at $10 each and the rest at $15 each, what was her total profit?
Total profit = 30% x 100 x 10 + (1-30%) x 100 x 15 - 1250
= 300 + 1050 - 1250
= $100
30% of 100 books are sold for $10 : 30% x 100 x 10
The rest(100% - 30%) of 100 books are sold for $15 : (1-30%) x 100 x 15
30 % of 100 books is 30 books at 10 dollars each = $300
70% of 100 books is 70 books at 15 dollars each = $1050
Total sales = 300 + 1050 = $1350
Total cost = 1250
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Profit = 1350 - 1250 = $ 100
Good job guest, for that table.
P.S. I am using an alt LOL
Her loss is $75 and her benefit is $175 so her total benefit is:
Profit-Loss = Pure Profit
$175-$75 = $100
