• Raul and his friends weigh 1/20 tons. (each of them).
,• The total weight shown is 3/4 ton.
The total number of people on the scale (assuming not taking the weight of the truck) is:
[tex]\frac{total-weight}{\frac{1}{20}}=\frac{\frac{3}{4}}{\frac{1}{20}}=\frac{3\cdot20}{4}=\frac{60}{4}=15[/tex]Therefore, the total number of people on the scale is 15 people.
