A) Draw ogives from the following data and measure the median value. Verify it by actual calculation

Central size |
5 |
15 |
25 |
35 |
45 |

Frequency |
5 |
11 |
21 |
16 |
10 |

B) Complete the following distribution if its median is 2600 and compute the value of arithmetic mean

Size |
1000-1500 |
1500-2000 |
2000-2500 |
2500-3000 |
3500-4000 |
4500-5000 |
5000-6000 |
Total |

Frequency |
120 |
? |
400 |
500 |
? |
50 |
20 |
1500 |

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