Question

A mixture of 30 pounds of candy sells for $1.10 a pound. The mixture consists of chocolates worth $1.50 a pound and chocolates worth 90¢ a pound. How many pounds of the $1.50 chocolate were used to make the mixture?

Answer 1

Price Equation:
1.5*a + 0.9*b = 1.1*30 = 33

Quantity Equation:
a + b = 30

Solve the system.

Answer 2

a=10
b=20

Answer 3

choices are

15
10
12