4.3

1 How many of them are red?
8

 2 How many of them are blue?
15

 3 How many of them are happy?
14

 4 How many of them are sad?
17

 5 How many of them are red AND sad?
30

 6 How many of them are blue AND have black eyes?
8


 7 How many of them are green AND have white eyes AND are sad?
3

 8 How many of them are blue OR green?
22

 9 How many of them are happy OR have white eyes?
20


10 How many of them are happy OR have black eyes OR are blue?
26