The total monthly incomes of 20 men is $39000.
34 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 |
15 |
5 |
|
Value |
1 u |
3 u |
|
Total value |
15 u |
15 u |
30 u |
Number of men with lower incomes
=
34 x 20
= 15
Number of men with higher incomes
= 20 - 15
= 5
Total monthly incomes
= 15 u + 15 u
= 30 u
30 u = 39000
1 u = 39000 ÷ 30 = 1300
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 1300
= $2600
Answer(s): $2600