The marks (out of 10) obtained by five students have and

MATHEMATICS · Single correct · CBSE · Mathematics · Statistics · Statistics

Problem

The marks (out of 10) obtained by five students have ∑xi2=150\sum x_{i}^{2}=150 and ∑xi=25\sum x_{i}=25. Find the variance of the marks. (a) 6.256.25 (b) 2.52.5 (c) 55 (d) 12.512.5

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