The ratio of the number of books published by publishers P and Q is 

 If the total number of books published by publishers P, Q and R is increased by 30% and the total number of books published by remaining publishers be decreased by 20%, what will be the new average of books published by all the publishers?

What is the total number of books distributed by publishers 0 and Q ? 

What is the average number of non-academic books published by publishers R and S ?

How many books were given to each distributor by publisher Q if each publisher gets equal number of books ?

What is the difference between the number of academic books published by publishing houses M and P ?