Schools | No. of Candidates | Average Score |
I. | 60 | 75 |
II. | 48 | 80 |
III. | Not available | 55 |
IV. | 40 | 50 |
A) 51
B) 52
C) 50
D) 53
Correct Answer: B
Solution :
Let the number of candidates that appeared from school ill-be x.School | Average \[{{x}_{i}}\] | Number of Candidates \[({{f}_{i}})\] | \[{{f}_{i}}{{x}_{i}}\] |
I | 75 | 60 | 4500 |
II | 80 | 48 | 3840 |
III | 55 | x | 55 x |
IV | 50 | 40 | 2000 |
\[\Sigma {{f}_{i}}=148+x\] | \[\Sigma {{f}_{i}}{{x}_{i}}=10340+55x\] |
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