Question 70045

Let x=number of females
Then 360-x=number of males
And 0.90(360-x)=number of males that can read and write
0.80(360)= number of males and females that can read and write

Number of males that can read and write + number of females that can read and write equals  0.80(360).  So our equation to solve is:

0.9(360-x)+180=0.8(360)
324-0.9x+180=288
504-0.9x=288  subtract 504 from both sides
-0.9x=288-504
-0.9x=-216  divide both sides by -0.9
x=240-------------------------------------number of females
360-x=360-240=120----------------------------number of males

ck

90% of the males = 0.9(120)=108
108+180=288
80% of 360=288


Hope this helps----ptaylor