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A factory in Pune records the number of articles produced per worker per day for 50 workers:
10-15: 6, 15-20: 12, 20-25: 17, 25-30: 10, 30-35: 5.
Find the mean production per worker using the direct method.

Class 10Mean of Grouped DataStatistics and Probability
  • A22.1
  • B44.2
  • C24.1
  • D20.1

Step-by-Step Solution

Class marks: 12.5,17.5,22.5,27.5,32.5. fi*xi = 6*12.5+12*17.5+17*22.5+10*27.5+5*32.5 = 75+210+382.5+275+162.5 = 1105. sum fi = 50. Mean = .
Answer: A) 22.1

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