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The monthly incomes of 10 households (in rupees) are 16500, 21700, 18600, 21050, 19500, 17000, 21000, 18000, 22000, 17500. Their mean monthly income is:
A18 600 rupees
B20 000 rupees
C19 285 rupees
D21 050 rupees
Answer & Solution
Correct answer: C. 19 285 rupees
1. Mean = (sum of all values) / (number of values).
2. Sum = 16500 + 21700 + 18600 + 21050 + 19500 + 17000 + 21000 + 18000 + 22000 + 17500 = 192 850.
3. Number of values = 10.
4. Mean = 192 850 / 10 = 19 285.
5. So the mean monthly income is 19 285 rupees.
_Source: SCERT Kerala Std X Mathematics Part-2, Chapter 9-11 (pp 227-246, 2019 ed.)._
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