The total monthly incomes of 15 men is $42900.
35 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 |
9 |
6 |
|
Value |
1 u |
5 u |
|
Total value |
9 u |
30 u |
39 u |
Number of men with lower incomes
=
35 x 15
= 9
Number of men with higher incomes
= 15 - 9
= 6
Total monthly incomes
= 9 u + 30 u
= 39 u
39 u = 42900
1 u = 42900 ÷ 39 = 1100
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 1100
= $4400
Answer(s): $4400