The total monthly incomes of 28 men is $259200.
27 of them earn the same monthly income each. Each of the remaining men earns 5 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 |
8 |
20 |
|
Value |
1 u |
5 u |
|
Total value |
8 u |
100 u |
108 u |
Number of men with lower incomes
=
27 x 28
= 8
Number of men with higher incomes
= 28 - 8
= 20
Total monthly incomes
= 8 u + 100 u
= 108 u
108 u = 259200
1 u = 259200 ÷ 108 = 2400
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 2400
= $9600
Answer(s): $9600