Marks | No. of I students |
0 - 10 | 5 |
10 - 20 | 10 |
20 - 30 | 25 |
30 - 40 | 30 |
40 - 50 | 20 |
50 - 60 | 10 |
A) 55
B) 35
C) 33
D) 2
Correct Answer: C
Solution :
Mid-values | No. of students | Product |
5 | 5 | 25 |
15 | 10 | 150 |
25 | 25 | 625 |
35 | 30 | 1050 |
45 | 20 | 900 |
55 | 10 | 550 |
100 | 3300 |
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