The total monthly incomes of 20 men is $86400.
45 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 |
16 |
4 |
|
Value |
1 u |
5 u |
|
Total value |
16 u |
20 u |
36 u |
Number of men with lower incomes
=
45 x 20
= 16
Number of men with higher incomes
= 20 - 16
= 4
Total monthly incomes
= 16 u + 20 u
= 36 u
36 u = 86400
1 u = 86400 ÷ 36 = 2400
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 2400
= $9600
Answer(s): $9600