Question

The frequency table of the monthly salaries of 20 people is shown below.

Salary(Rs.)

3500

4000

4200

4300

Frequency

5

8

5

2

a)

Calculate the mean of the salaries of the 20 people.

b)

Calculate the standard deviation of the salaries of the 20 people.​

Answer 1

part A is 800

please markme as brilliant