Have you tried making a Venn diagram?
Hint: let the intersection of all 3 circles be x
you can fill in the "volleyball only" and "badminton only" parts.
Fill in the rest
In a group of girls, 20 play volleyball, 21 play badminton and 18 play table tennis; 7 play volleyball only; 9 play badminton only; 6 play volleyball and badminton only and 2 play badminton and table-tennis only.
a)How many play all three games?
b)How many play volleyball and table-tennis only?
c)How many play table-tennis only?
d)How many girls are there altogether?
1 answer