The total monthly incomes of 30 men is $306000.
25 of them earn the same monthly income each. Each of the remaining men earns 5 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 |
18 |
|
Value |
1 u |
5 u |
|
Total value |
12 u |
90 u |
102 u |
Number of men with lower incomes
=
25 x 30
= 12
Number of men with higher incomes
= 30 - 12
= 18
Total monthly incomes
= 12 u + 90 u
= 102 u
102 u = 306000
1 u = 306000 ÷ 102 = 3000
Difference between the higher monthly income and the lower monthly income
= 5 u - 1 u
= 4 u
= 4 x 3000
= $12000
Answer(s): $12000