public class Solution
extends Object
1619 - Mean of Array After Removing Some Elements\.
Easy
Given an integer array `arr`, return _the mean of the remaining integers after removing the smallest `5%` and the largest `5%` of the elements._
Answers within 10-5 of the **actual answer** will be considered accepted.
**Example 1:**
**Input:** arr = [1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3]
**Output:** 2.00000
**Explanation:** After erasing the minimum and the maximum values of this array, all elements are equal to 2, so the mean is 2.
**Example 2:**
**Input:** arr = [6,2,7,5,1,2,0,3,10,2,5,0,5,5,0,8,7,6,8,0]
**Output:** 4.00000
**Example 3:**
**Input:** arr = [6,0,7,0,7,5,7,8,3,4,0,7,8,1,6,8,1,1,2,4,8,1,9,5,4,3,8,5,10,8,6,6,1,0,6,10,8,2,3,4]
**Output:** 4.77778
**Constraints:**
* `20 <= arr.length <= 1000`
* `arr.length` **is a multiple** of `20`.
* 0 <= arr[i] <= 105