The total monthly incomes of 15 men is $92400.
25 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 |
6 |
9 |
|
Value |
1 u |
3 u |
|
Total value |
6 u |
27 u |
33 u |
Number of men with lower incomes
=
25 x 15
= 6
Number of men with higher incomes
= 15 - 6
= 9
Total monthly incomes
= 6 u + 27 u
= 33 u
33 u = 92400
1 u = 92400 ÷ 33 = 2800
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 2800
= $5600
Answer(s): $5600