The total monthly incomes of 25 men is $161000.
25 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 |
10 |
15 |
|
Value |
1 u |
4 u |
|
Total value |
10 u |
60 u |
70 u |
Number of men with lower incomes
=
25 x 25
= 10
Number of men with higher incomes
= 25 - 10
= 15
Total monthly incomes
= 10 u + 60 u
= 70 u
70 u = 161000
1 u = 161000 ÷ 70 = 2300
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2300
= $6900
Answer(s): $6900