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 : | Age (in years) | Number of Persons | |----------------|-------------------| | Less than 10 | 3 | | Less than 20 | 10 | | Less than 30 | 22 | | Less than 40 | 40 | | Less than 50 | 54 | | Less than 60 | 71 |

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:

Determine median of the following frequency distribution : | Class | Frequency | |-------|----------| | 15 – 20 | 8 | | 20 – 25 | 13 | | 25 – 30 | 21 | | 30 – 35 | 12 | | 35 – 40 | 5 | | 40 – 45 | 4 |

The time, in seconds, taken by 150 athletes to run a 100 m hurdle race are tabulated below: | Time (sec.) | 13-14 | 14-15 | 15-16 | 16-17 | 17-18 | 18-19 | |-------------|-------|-------|-------|-------|-------|-------| | Number of Athletes | 2 | 4 | 5 | 71 | 48 | 20 | The number of athletes who completed the race in less than 17 seconds is