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For the previous wickets data (classes and frequencies: 20-60:7, 60-100:5, 100-150:16, 150-250:12, 250-350:2, 350-450:3), find the mean number of wickets using the direct method. Round to the nearest whole number.

Class 10Mean of Grouped DataStatistics and Probability
  • A306
  • B153
  • C138
  • D168

Step-by-Step Solution

Class marks: 40,80,125,200,300,400. fi*xi = 7*40+5*80+16*125+12*200+2*300+3*400 = 280+400+2000+2400+600+1200 = 6880. sum fi = 45. Mean = ~ 153.
Answer: B) 153

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