The total monthly incomes of 12 men is $37800.
34 of them earn the same monthly income each. Each of the remaining men earns 4 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 |
3 |
|
Value |
1 u |
4 u |
|
Total value |
9 u |
12 u |
21 u |
Number of men with lower incomes
=
34 x 12
= 9
Number of men with higher incomes
= 12 - 9
= 3
Total monthly incomes
= 9 u + 12 u
= 21 u
21 u = 37800
1 u = 37800 ÷ 21 = 1800
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 1800
= $5400
Answer(s): $5400