Question

6. Find the mean of the following distribution:
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Answer 1

Mean = Sum of all the observations/Total number of observations

= 5+10+10+15+15+15+15+15+20+20+20+20+20+20+25+25+25+30+30+35/20

= 390/20

= 19.5

Ans. The mean of the observations is 19.5