Find the mean and standard deviation using short-cut method
MATHEMATICS · Subjective · CBSE · Mathematics · Statistics · Statistics
Problem
6. Find the mean and standard deviation using short-cut method.| 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | |
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| 2 | 1 | 12 | 29 | 25 | 12 | 10 | 4 | 5 |