- 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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