Marks of the students in a particular subject of a class are given below.
| Marks | \(0 - 10\) | \(10 - 20\) | \(20 - 30\) | \(30 - 40\) | \(40 - 50\) | \(50 - 60\) | \(60 - 70\) |
| Number of students | \(8\) | \(12\) | \(17\) | \(14\) | \(9\) | \(7\) | \(4\) |
Find its standard deviation.
Answer:
The standard deviation is