Start from second class

 Mulla Naseeruddin wanted to learn how to blow whistle.

He went near an artist and asked him to teach him how to blow whistle. 

Artist agreed and said Naseeruddin that 

For the first class, he will charge 300 dinars but after that  for

remaining classes, he will charge only 100 dinars  !!

Naseeruddin said, 

No problem..... I will start attending from second class  !!!!