Thank you very much for your help. One more questions goes....
1. We have 25 boys in our class. All of them have a TV at home.
2. We have 25 boys in our class. They have a TV at home.
======================
#1 mean each boy has a TV at home. Am I right? #2 means the same thing, right?
We have 25 boys in our class. All of them have TVs at home.
We have 25 boys in our class. Each of them has a TV at home.