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Income classes 0-10,000 to 30,000-40,000 hold 20, 40, 30 and 10 families. Mean income?
ARs 18,000
BRs 20,000
CRs 15,000
DRs 25,000
Answer & Solution
Correct answer: A. Rs 18,000
With midpoints 5,000, 15,000, 25,000 and 35,000, the sum of fx is 18,00,000, and dividing by 100 families gives 18,000.
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