The total monthly incomes of 15 men is $61200.
25 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 |
6 |
9 |
|
Value |
1 u |
5 u |
|
Total value |
6 u |
45 u |
51 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 + 45 u
= 51 u
51 u = 61200
1 u = 61200 ÷ 51 = 1200
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 1200
= $4800
Answer(s): $4800