The total monthly incomes of 10 men is $40000.
45 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 |
8 |
2 |
|
Value |
1 u |
4 u |
|
Total value |
8 u |
8 u |
16 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 + 8 u
= 16 u
16 u = 40000
1 u = 40000 ÷ 16 = 2500
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2500
= $7500
Answer(s): $7500