The total monthly incomes of 28 men is $136000.
27 of them earn the same monthly income each. Each of the remaining men earns 3 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 |
3 u |
|
Total value |
8 u |
60 u |
68 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 + 60 u
= 68 u
68 u = 136000
1 u = 136000 ÷ 68 = 2000
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 2000
= $4000
Answer(s): $4000