The national history museum has collected 125 dinosaurs George has collected three fifths of this amount How many dinosaurs has George collected?

To find out how many dinosaurs George has collected, we calculate three fifths of 125. This can be done by multiplying 125 by ( \frac{3}{5} ), which gives us ( 125 \times 0.6 = 75 ). Therefore, George has collected 75 dinosaurs.