¾ of the girls in SS2 play basketball and 4 over 7 play Valley ball. Every girl plays at least one of these games. If 27 Girls play both games, how many girls are there in the class
number of girls in class --- x
number playing basketball = 3x/4
number playing volley ball = 4x/7
number playing both = 27
3x/4 + 4x/7 - 27 = x
times 28, the LCD
24x + 16x - 756 = 28x
12x = 756
x = 63 , huge class!
Valley ball ?????