Mindy had five test last month, her scores were 95,86,78,80, and 91. what is the range of her scores

The range of her scores is 17.

Explanation

Mindy's scores in five tests are:  

First, rearranging the data in numerical order, we will get ........

'Range' is the difference between the highest and lowest values.  

In the above data set, highest value is 95 and lowest value is 78

So, the range of her scores will be:  

i belive the biggest ratio would be 18: correct me if im wrong