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- 10 Days of Statistics
- Day 0: Weighted Mean

# Day 0: Weighted Mean

# Day 0: Weighted Mean

**Objective**

In the previous challenge, we calculated a *mean*. In this challenge, we practice calculating a *weighted mean*. Check out the Tutorial tab for learning materials and an instructional video!

**Task**

Given an array, , of integers and an array, , representing the respective weights of 's elements, calculate and print the weighted mean of 's elements. Your answer should be rounded to a scale of decimal place (i.e., format).

**Input Format**

The first line contains an integer, , denoting the number of elements in arrays and .

The second line contains space-separated integers describing the respective elements of array .

The third line contains space-separated integers describing the respective elements of array .

**Constraints**

- , where is the element of array .
- , where is the element of array .

**Output Format**

Print the *weighted mean* on a new line. Your answer should be rounded to a scale of decimal place (i.e., format).

**Sample Input**

```
5
10 40 30 50 20
1 2 3 4 5
```

**Sample Output**

```
32.0
```

**Explanation**

We use the following formula to calculate the weighted mean:

And then print our result to a scale of decimal place () on a new line.