The total monthly incomes of 10 men is $21000.
45 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 |
8 |
2 |
|
Value |
1 u |
3 u |
|
Total value |
8 u |
6 u |
14 u |
Number of men with lower incomes
=
45 x 10
= 8
Number of men with higher incomes
= 10 - 8
= 2
Total monthly incomes
= 8 u + 6 u
= 14 u
14 u = 21000
1 u = 21000 ÷ 14 = 1500
Difference between the higher monthly income and the lower monthly income
= 3 u - 1 u
= 2 u
= 2 x 1500
= $3000
Answer(s): $3000