Hi there! Today’s problem is quite simple. The challenge is to compute the weighted mean given two arrays. The first input is $N$, the number of elements of each array, and then the first array is given and then the second whose components are the weights. My solution is given below.

```
package main
import "fmt"
func main() {
N := 0
fmt.Scanf("%d", &N)
a := make([]float64, N)
b := make([]float64, N)
for i := 0; i < N; i++ {
fmt.Scanf("%f", &a[i])
}
for i := 0; i < N; i++ {
fmt.Scanf("%f", &b[i])
}
numerator := 0.0
denominator := 0.0
for i := 0; i < N; i++ {
numerator += a[i] * b[i]
denominator += b[i]
}
mean := numerator / denominator
fmt.Printf("%.1f\n", mean)
}
```

The only problem I had was that I forgot to read the arrays initially 😆. The rest of the code was quite easy given what I learned so far. I made use of type inference in Go which is quite nice. If you have any comments, don’t hesitate to post it on disqus! See you!