The total monthly incomes of 15 men is $96600.
25 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 |
9 |
|
Value |
1 u |
4 u |
|
Total value |
6 u |
36 u |
42 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 + 36 u
= 42 u
42 u = 96600
1 u = 96600 ÷ 42 = 2300
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2300
= $6900
Answer(s): $6900