Question

A museum is a place where old relics are kept for public display. A visit to the museum imparts us knowledge about the history, civilization, culture, lifestyle, architecture and art of the country. A group of 71 people visited the National Museum in Delhi on a certain day. The following table shows their ages:

For the following distribution | Marks below | Number of Students | |-------------|--------------------| | 10 | 1 | | 20 | 5 | | 30 | 13 | | 40 | 15 | | 50 | 16 | the modal class is :

Compute the median for the following cumulative frequency distribution:

Consider the following distribution: | Marks obtained | Number of students | |----------------|--------------------| | More than or equal to 0 | 63 | | More than or equal to 10 | 58 | | More than or equal to 20 | 55 | | More than or equal to 30 | 51 | | More than or equal to 40 | 48 | | More than or equal to 50 | 42 | the frequency of the class 30-40 is