In a continuous series the average marks of some students is 40 and the sum of their marks is 1200. Then find the number of students.
1 Answer
Solution:
Given: In a continuous series,
Average marks (\(\overline x\)) = 40
and sum of their marks (∑fm) = 1200.
To find: No of students (N)
By formula,
\(\overline x=\frac{\sum fm}N\)
Or, \(40=\frac{1200}N\)
Or, \(40\times N=1200\)
Or, N = 30
∴ The number of students (N) = 30 is the required answer
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