Question

find the mean of the following data
Classes- 0-10; 10-20; 20-30; 30-40; 40-50; 50-60; 60-70; 70-80
Frequency-12; 7; 16; 12; 11; 7; 19; 16

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Answer 1

Step-by-step explanation:

Mean is 42. this is the answer