? ( 22 , 10 , 6 , 18 )
10
? ( 17 , 14 , 10 , 9 )
9
? ( 9 , 8 , 7 , 6 )
9
How many students watch movies on both a computer and a TV ? ( 35 , 7 , 5 , 3 )
7
How many students do not watch movies on either a computer or a TV ? ( 35 , 7 , 5 , 3 )
3
? ( 15 , 3 , 6 , 5 )
6