Finding median for Grouped Data when class Intervals are given

Q.

Consider the following frequency distribution:

Class	$0-5$	$6-11$	$12-17$	$18-23$	$24-29$
Frequency	$13$	$10$	$15$	$8$	$11$

The upper limit of the median class is ____________ .

1. $17$

2. $17.5$

3. $18$

4. $18.5$

Q.

The median for the following data is _____.

$$\begin{array}{ccccc}\text{Class interval}& 0-10& 10-20& 20-30& 30-40\\ \text{Frequency}& 7& 15& 16& 12\end{array}$$

1. 25
2. 20
3. 22.5
4. 21.875

Q.

Find the median class for the below distribution.

$$\begin{array}{cc}Class& Cumulative\\ Interval& Frequency\\ 10-20& 3\\ 20-30& 17\\ 30-40& 24\\ 40-50& 33\\ 50-60& 51\end{array}$$

1. 40-50
2. 50-60
3. 30-40
4. 20-30