To find the range, subtract the least value from the greatest value: $\displaystyle{70}-{10}={60}\usepackage{cmbright}\Huge\$ .

To find the midrange, add together the least and the greatest values and divide by 2: $\displaystyle\frac{{{70}+{10}}}{{2}}=\frac{{80}}{{2}}={40}\usepackage{cmbright}\Huge\$

The range is 60 which is larger than the midrange of 40.