The total monthly incomes of 10 men is $30800.
25 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 |
4 |
6 |
|
Value |
1 u |
4 u |
|
Total value |
4 u |
24 u |
28 u |
Number of men with lower incomes
=
25 x 10
= 4
Number of men with higher incomes
= 10 - 4
= 6
Total monthly incomes
= 4 u + 24 u
= 28 u
28 u = 30800
1 u = 30800 ÷ 28 = 1100
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 1100
= $3300
Answer(s): $3300