Question

find
arithmetic
mean
the
Marks
10
15
20
25
30
No. of students
6
8
10
2
5
​

Answer 1

Answer:

don't you know I am weak

Answer 2

Solution:


Mean = A + (Σfd/n) * h

= 20 + (-8/31) * 5

= 20 + (-0.2581) * 5

= 20 + (-1.2903) = 18.7097

Hope this will be helpful

Look at the diagram below