The total monthly incomes of 10 men is $41800.
25 of them earn the same monthly income each. Each of the remaining men earns 3 times as much per month. Find the difference between the higher monthly income and the lower monthly income.
|
Men with lower incomes |
Men with higher incomes |
Total incomes |
Number |
4 |
6 |
|
Value |
1 u |
3 u |
|
Total value |
4 u |
18 u |
22 u |
Number of men with lower incomes
=
25 x 10
= 4
Number of men with higher incomes
= 10 - 4
= 6
Total monthly incomes
= 4 u + 18 u
= 22 u
22 u = 41800
1 u = 41800 ÷ 22 = 1900
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 1900
= $3800
Answer(s): $3800