**Q) **Following is the daily expenditure on lunch by 30 employees of a company:

Find the mean daily expenditure of the employees.

**Ans: **Let’s re-arrange the data with midpoint of each class, frequency, and multiply midpoint with frequency:

We know that, mean of grouped data is given by:

Mean of grouped data = 150 +

Therefore, Mean expenditure = 150 + = 148

**Hence, the mean expenditure of the given data is 148.**