Question

I need help with this work problem please. I put the picture of problem thank you.

Answer 1

Your work looks good, the ages will be 

$\bf \stackrel{\textit{20 to 30}}{25\%}~~+~~\stackrel{\textit{31 to 40}}{22\%}~~+~~\stackrel{\textit{41 to 50}}{13\%}\implies 60\% \\\\\\ \textit{60\% of 125000}\implies \cfrac{60}{100}\cdot 125000\implies 75000$