why doesn't it work

Question

Create a function that takes an array of numbers and returns the mean value. ( https://edabit.com/challenge/eETZxgueSqivPBmAX )

using System.Linq;
public class Program
{
public static double Mean(int[] arr) => arr.Average();

}

Says:

FAILED: Expected: 2.5499999999999998d
But was: 2.5454545454545454d

so why does it work with all the other tests but not that one
thanks for replies

Answer 1

Michael Check notes in problem. You should get output upto 2 decimal point. Do like this

int[] arr = {1, 0, 4, 5, 2, 4, 1, 2, 3, 3, 3};

double x = arr.Average();

Console.Write(Math.Round(x, 2)); //2.55

Answer 2

Could you show your attempt here on the playground?