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The number of mangoes harvested (per tree) on Ramesh's farm is grouped as shown in the bar chart, with class marks 20, 30, 40 and frequencies 4, 6, 2.
Find the mean number of mangoes per tree using the direct method.

Class 10Mean of Grouped DataStatistics and Probability
  • A56.66
  • B25.33
  • C28.33
  • D31.33

Step-by-Step Solution

sum(fi*xi) = 4*20 + 6*30 + 2*40 = 80 + 180 + 80 = 340. sum(fi) = 4 + 6 + 2 = 12. Mean = (approx).
Answer: C) 28.33

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