The total monthly incomes of 15 men is $55200.
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 |
12 |
3 |
|
Value |
1 u |
4 u |
|
Total value |
12 u |
12 u |
24 u |
Number of men with lower incomes
=
45 x 15
= 12
Number of men with higher incomes
= 15 - 12
= 3
Total monthly incomes
= 12 u + 12 u
= 24 u
24 u = 55200
1 u = 55200 ÷ 24 = 2300
Difference between the higher monthly income and the lower monthly income
= 4 u - 1 u
= 3 u
= 3 x 2300
= $6900
Answer(s): $6900