peachtree wrote:

1. On July 1 of last year, the total # of employees at Company E was decreased by 10%. Without any change in salaries of the remaining employees, the average salary was 10% more after the decrease in the # of employees than before the decrease. The total (sum) of combined salaries after July last year was what percent of that before July 1 last year?

a) 90%

b) 99%

c) 100%

d) 101%

e) 110%

2. Three grades of milk are 1%, 2% and 3% by volume. If x gallons of the 1%, y gallons of the 2% and z gallons of the 3% are mixed to give x+y+z gallons of a 1.5% grade, what is x in terms of y?

a) y + 3z

b) (y+4)/4

c) 2y + 3z

d) 3y + z

e) 3y + 4.5z

1) Let Number of employees be E.

Let average Salary be A

After July 1st

Number of employees = 9E/10

Average Salary = 11A/10

Total salary before July 1st = EA

Total salary after July 1st = 99/100 * EA

Hence B

2) Amount of milk(by volume) in x gallons = 1/100 * X

Amount of milk(by volume) in y gallons = 2/100 * y

Amount of milk(by volume) in z gallons = 3/100 * z

Hence

1/100 * X + 2/100 * y + 3/100 * z = 1.5/100 * (x+y+z)

-5x/100 = -5y/1000 - 15z/1000

x = y +3z

Hence A