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प्रश्न
Find the mean of all factors of 10.
उत्तर
Factors of 10 = 1, 2, 5, 10
Mean = `"Sum of observations"/"No. of observations"`
Sum of observations = 1 + 2 + 5 + 10 = 18
No. of observations = 4
Mean = `18/4 = 9/2 = 4.5`
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