Ling is conducting a survey outside of a grocery store. The double number lime shows the ratio of customers using reusable shopping bags : costumers using plastic bags on a typical day. If there are 50 costumers that use plastic bags, how many reusable shopping bags?
![Ling is conducting a survey outside of a grocery store The double number lime shows the ratio of customers using reusable shopping bags costumers using plastic class=](https://us-static.z-dn.net/files/dcc/897ccbfe82ed1c7c71f798f97554291d.jpg)