Mean, Median and Mode- Calculations and Interpretations

For any data, Median is 25 and Mode is 24, then find the Mean.

Calculate the arithmetic mean of the following data :
Weekly wages (₹): 11-13 | 13-15 | 15-17 | 17-19 | 19-21 | 21-23 | 23-25
Number of Labour: 3 | 4 | 5 | 6 | 5 | 4 | 3

Find the mode for the following frequency distribution: Class interval 25-30/30-35/35-40/40-45/45-50/50-55, Frequency 20/53/42/42/38/36.

What is the formula to find the class-mark of a class interval ?

The ages of 50 women who have committed suicide is given below. Find out the average age of the women from it.
Age of women in years : 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65
No. of women : 8, 10, 8, 6, 4, 7, 3, 2, 2, 0
N = 50

Write notes on mean, median and mode.