Teaching HTET TGT Level 2 - 2024 Mock Test Mathematics Statistics Measures of Central Tendency

Find the mean of given data:

 class interval 10-20 20-30 30-40 40-50 50-60 60-70 70-80
 Frequency 9 13 6 4 6 2 3

1
39.95
2
35.70
3
43.95
4
23.95
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