**If the average marks of three batches of 55, 60, and 45 students respectively is 50, 55, and 60 then the average marks of all the students is?**

### Note

**Average marks of all students = (55×50+60×15+45×60)/160**

= {(55×5)+(6×15)+(45×6)}/16

= (275+90+270)/16

= (635/16)

= 39.68