- A9.1
- B16.2
- C7.1
- D8.1
Step-by-Step Solution
Class marks: 1,3,5,7,9,11,13. fi*xi = 1+6+5+35+54+22+39 = 162. sum fi = 20. Mean = .
Answer: D) 8.1
In a survey, the number of plants per house in a Bengaluru locality was recorded for 20 houses:
0-2: 1, 2-4: 2, 4-6: 1, 6-8: 5, 8-10: 6, 10-12: 2, 12-14: 3.
Find the mean number of plants per house using the direct method.
Class 10Mean of Grouped DataStatistics and Probability
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