JEE Main 2022 Mathematics question
If the mean deviation about the mean of the numbers 1, 2, 3, ......., n, where n is odd, is 5(n + 1)/n, then n is equal to .
Answer: 21
Solution
The mean is (n + 1)/2. For odd n the deviations from the mean are 0, 1, 1, 2, 2, …, (n − 1)/2, (n − 1)/2, so −
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account