M8 wrote:

On July 1, of last year, the total number of employees at Company E was decreased by 10 percent. Wothout any change in the salaries of the remaining employees, the average (arithmetic mean) employee salary was 10 percent more after the decrease in number of employees than before the decrease. The total of the combined salaries of all of the employees at Company E after July 1 last year was what percent of that before July 1 last year?

1) 90

2) 99

3) 100

4) 101

5) 110

before

the total number of employees = n

the average salary = x

total salary to all emplyoees = xn

after

the total number of employees = n - 0.1n = 0.9n

the average salary = x + 10% of x = 1.1x

total salary to all emplyoees = 0.9n (1.1x)

total salary after as a % of total salary before = [0.9n (1.1x)]/xn= 0.99 or 99%