The total monthly incomes of 25 men is $108000.
45 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 |
20 |
5 |
|
Value |
1 u |
5 u |
|
Total value |
20 u |
25 u |
45 u |
Number of men with lower incomes
=
45 x 25
= 20
Number of men with higher incomes
= 25 - 20
= 5
Total monthly incomes
= 20 u + 25 u
= 45 u
45 u = 108000
1 u = 108000 ÷ 45 = 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