Question

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

Options

• 53.33

• 54.68

• 55

• None of the above

Answer 1

54.68
Explanation:
Required average 

= `((55xx50+60xx55+45xx60)/(55+60+45))`

= `((2750+3300+2700)/160) = 8750/160` = 54.68