The total monthly incomes of 28 men is $60000.
57 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 |
8 |
|
Value |
1 u |
5 u |
|
Total value |
20 u |
40 u |
60 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 + 40 u
= 60 u
60 u = 60000
1 u = 60000 ÷ 60 = 1000
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 1000
= $4000
Answer(s): $4000