### Home > MC2 > Chapter 10 > Lesson 10.2.1 > Problem10-88

10-88.

Notice that this is a proportion problem. The weight per pencil does not change as the number of pencils increase or decrease.

Set up a proportional expression that compares the number of pencils to the weight of the pencils.

$\frac{\text{20 pencils}}{\text{12 ounces}} = \frac{\text{50 pencils}}{\text{x ounces}}$

Solve for x.

x = 30