Number of days | Number of students |
0 - 5 | 11 |
5 - 10 | 10 |
10 - 15 | 7 |
15 - 20 | 4 |
20 - 25 | 4 |
25 - 30 | 3 |
30 - 35 | 1 |
A) 11.625
B) 10.375
C) 8.965
D) 12.25
Correct Answer: A
Solution :
(a):\[{{x}_{i}}\] | \[{{f}_{i}}\] | \[{{f}_{i}}{{x}_{i}}\] | |
0 ? 5 | 2.5 | 11 | 27.5 |
5 ? 10 | 7.5 | 10 | 75.0 |
10 ? 15 | 12.5 | 7 | 87.5 |
15 ? 20 | 17.5 | 4 | 70.0 |
20 ? 25 | 22.5 | 4 | 90.0 |
25 ? 30 | 27.5 | 3 | 82.5 |
30 ? 35 | 32.5 | 1 | 32.5 |
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