Question

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

Answer 1

Answer: 54.7

Step-by-step explanation:

Average marks = $\frac{Total marks}{Number of students}$

So, Total marks = Average marks X Number of students

For batch 1, Number of students - 55 and Average marks = 50

So, Total marks = 55 X 50 = 2750

For batch 2,  Total marks = 60 X 55 = 3300

For batch 3, Total marks = 45 X 60 = 2700

Adding the total marks for all three batches, the grand total = 8750

Total number of students for all batches = 55 + 60 + 45 = 160

So, the average marks for all students combined = $\frac{8750}{160}$ = 54.7