Within a computer service company 20 percent of the male emp

Within a computer service company, 20 percent of the male employee and 30 percent of the female employee attached night school. If 40 percent of all employee and male, what percent of all the employee attend night school? 30% 20% 27.5% 26% 25%

Solution

1) let x be the no. of employess

male employee -- 0.4x

female employee --- 0.6x

night school : 20% of male employee = 0.2*(0.4x) =0.08x

30% of female employee = 0.3*(0.6x) =0.18x

Total employee attending night school = 0.08x +0.18x =0.26x

Percent of employee attending night school =0.26x/x = 26%

2) rent of copier $600 per month

let x be the purchase price of copier

total rent of copier = $600*12*5 = $36000

monthly maintenance = $100

total maintenance = 12*5*100 = $6000

So, 36000 - (x+6000) = $700

30000 -x = 700

x = $29300