The total monthly incomes of 30 men is $124200.
35 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 |
18 |
12 |
|
Value |
1 u |
3 u |
|
Total value |
18 u |
36 u |
54 u |
Number of men with lower incomes
=
35 x 30
= 18
Number of men with higher incomes
= 30 - 18
= 12
Total monthly incomes
= 18 u + 36 u
= 54 u
54 u = 124200
1 u = 124200 ÷ 54 = 2300
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 2300
= $4600
Answer(s): $4600