The total monthly incomes of 24 men is $122400.
58 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 |
15 |
9 |
|
Value |
1 u |
4 u |
|
Total value |
15 u |
36 u |
51 u |
Number of men with lower incomes
=
58 x 24
= 15
Number of men with higher incomes
= 24 - 15
= 9
Total monthly incomes
= 15 u + 36 u
= 51 u
51 u = 122400
1 u = 122400 ÷ 51 = 2400
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2400
= $7200
Answer(s): $7200