The total monthly incomes of 15 men is $72600.
35 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 |
9 |
6 |
|
Value |
1 u |
4 u |
|
Total value |
9 u |
24 u |
33 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 + 24 u
= 33 u
33 u = 72600
1 u = 72600 ÷ 33 = 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