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 <code>10^-5</code> 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.

• <code>0 <= arri<= 10⁵</code>