Question

The mean marks obtained by 25 students in a class is 35 and that of 35 students is 25.
Find the mean marks obtained by all the students. ​

Answer 1

Answer:

29.166

Step-by-step explanation:

Sum of marks of 25 students / 25 = 35

Sum of marks of 25 students = 35×25

= 875

Sum of marks of 35 students/35=25

Sum of marks of 35 students =25×35

=875

Total sum of marks of all the students=875+875

= 1750

Total no of students= 35+25 = 60

mean of all the students=1750/60= 29.17 (approx).

Hope it helped