Question

8.
Find the mean marks by step deviation method from the to
Marks
Below 10 Below 20 Below 30
Number of students
Step deviation method from the following data
Below 20 Below 30 Below 40 Below 50 Below 60
18
40
70
28
10

Answer 1

Answer:

Step-by-step explanation:

Thanks for free points.......

Answer 2

Answer:

$21y {51266 \times \frac{36364}{213} }^{13} 33 \times 316 \times {31}^{21}$