Question

Mary buys gum balls at 4 for 14 cents and sells them at 3 for 15 cents. How many gum balls must Mary sell in order to make a profit of $3.00 ? ( please show ur work)

Answer 1

cost of 1 gum=14/4=3.5
selling price of 1 gum=15/3=5
profit in 1 gum=5-3.5=1.5 cents

so mary will sell=(300/1.5)=200 gums to make a profit of $3.00

Answer 2

Thanks !