The total monthly incomes of 21 men is $145200.
27 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 |
6 |
15 |
|
Value |
1 u |
4 u |
|
Total value |
6 u |
60 u |
66 u |
Number of men with lower incomes
=
27 x 21
= 6
Number of men with higher incomes
= 21 - 6
= 15
Total monthly incomes
= 6 u + 60 u
= 66 u
66 u = 145200
1 u = 145200 ÷ 66 = 2200
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2200
= $6600
Answer(s): $6600