Weighted Averages

#include<stdio.h>
int main()
{
    int n,i;
    float a,b,c,avg;
    scanf("%d",&n);
    for(i=1; i<=n; i++)
    {
        scanf("%f %f %f",&a,&b,&c);
        avg=((a*2)+(b*3)+(c*5))/10;
        printf("%.1f\n",avg);
        a=0;
        b=0;
        c=0;
    }

    return 0;
}