Question

The mean of the following data is 42. Find the missing frequencies x and y if the sum of frequencies is 100.

The mean of the following frequency distribution is 25. Find the value of f.

Find the mean of the following data using assumed mean method :

The weights (in kg) of 50 wild animals of a National Park were recorded and the following data was obtained : | Weight (in kg) | Number of animals | |----------------|------------------| | 100 – 110 | 4 | | 110 – 120 | 12 | | 120 – 130 | 23 | | 130 – 140 | 8 | | 140 – 150 | 3 | Find the mean weight (in kg) of animals, using assumed mean method.