Problema Solution
In a concert hall, 1/7 of the audience were children. 75% of the adults were women. There were 280 more women than children.
a) How many women were there in the hall?
b) During the interval, some men left the hall. As a result, 12% of the remaining audiences were men. How many men left the hall?
Answer provided by our tutors
Total audience = x
children =x/7
woman = (x-x/7)*75/100
((x-x/7)*75/100)-x/7 =280
x=560
total audience = 560
chidren =560/7= 80
adults =560-80=480
woman= 480*75/100= 360
men =480-360-120