The total monthly incomes of 15 men is $75600.
35 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 |
9 |
6 |
|
Value |
1 u |
3 u |
|
Total value |
9 u |
18 u |
27 u |
Number of men with lower incomes
=
35 x 15
= 9
Number of men with higher incomes
= 15 - 9
= 6
Total monthly incomes
= 9 u + 18 u
= 27 u
27 u = 75600
1 u = 75600 ÷ 27 = 2800
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 2800
= $5600
Answer(s): $5600