Question

• 4
:
The marks obtained by some students in an exam are given below :
Find mean marks scored.
Marks no of students
10 - 20 7
20 - 30 12
30 - 40 18
40 - 50 13​

Answer 1

Answer:

it is continous so

Step-by-step explanation:

10+20÷2=16

find this for all

and then you can easily find mean

Answer 2

Answer:

10+20÷2=16

find this for all