Chapter 6.2, Problem 25E

To determine

To calculate : the number of eraser

Answer to Problem 25E

The number of eraser can be bought in $\$7.50$ is $15$

Explanation of Solution

Given information :

The question is:

  $5$ Erasers cost is $\$2.50$ then find number of eraser which cost $\$7.50$

Calculation :

Write the ratio for cost of $1$ eraser

  $\frac{2.5}{5}=0.5$

This implies that in $\$7.50$ so a person can buy $\frac{7.5}{0.5}$

Therefore,

Erasers $=\frac{7.5}{0.5}$

Erasers $=15$