The total monthly incomes of 28 men is $130000.
57 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 |
20 |
8 |
|
| Value |
1 u |
4 u |
|
| Total value |
20 u |
32 u |
52 u |
Number of men with lower incomes
=
57 x 28
= 20
Number of men with higher incomes
= 28 - 20
= 8
Total monthly incomes
= 20 u + 32 u
= 52 u
52 u = 130000
1 u = 130000 ÷ 52 = 2500
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2500
= $7500
Answer(s): $7500
