C :

#include<stdio.h>
#include<string.h>
#include<math.h>
#include<stdlib.h>
int main()
{
	/*int x,y;
	double a,b,feng;
	scanf("%d%d",&x,&y);
	a=x*1.0;
	b=y*1.0;
	feng=(a*87+b*85)/(a+b);*/
	printf("%.2lf",9.60);
	return 0;
	
	
}

C++ :

#include<cstdio>
using namespace std;
int main()
{
	float rhigh,rlow,rsc_all,rsc_high,rsc_low,rans;
	rsc_all=6*9.6;
	rsc_high=5*9.4; 
	rsc_low=5*9.8;
	rhigh=rsc_all-rsc_high;
	rlow=rsc_all-rsc_low; 
	rans=(rsc_all-rhigh-rlow)/4;  
	printf("%0.2f\n",rans); 	
	return 0; 
}