If 12 key chains cost $9, then 20 key chains cost $

Mathematics · High School · Mon Jan 18 2021

Answered on

Given :

Cost of 12 key chains = $9

So, cost of 1 key chains = $9/12

= $3/4

Now, cost of 12 key chains = $3/4 × 20

= $15

 

Thus, cost of 20 key chains is $15