Marks | 20 | 30 | 40 | 50 | 60 | 70 |
Number of student | 12 | 45 | 48 | 5 | 32 | 40 |
Answer:
Mean \[=\frac{\Sigma fx}{N}\] Putting values from table, Mean \[=\frac{8480}{182}=46.59.\] Marks (x) No. of Students \[f\times x\] 20 12 240 30 45 1350 40 48 1920 50 5 250 60 32 1920 70 40 2800 Total N = 182 \[\Sigma fx=8480\]
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