The total monthly incomes of 28 men is $112000.
34 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 |
21 |
7 |
|
Value |
1 u |
5 u |
|
Total value |
21 u |
35 u |
56 u |
Number of men with lower incomes
=
34 x 28
= 21
Number of men with higher incomes
= 28 - 21
= 7
Total monthly incomes
= 21 u + 35 u
= 56 u
56 u = 112000
1 u = 112000 ÷ 56 = 2000
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 2000
= $8000
Answer(s): $8000