#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;
const ll MOD=1e9+7;
ll powmod(ll a, ll k){
    ll ap=a, ans=1;
    while(k>0){
        if(k%2==1){
            ans*=ap;
            ans%=MOD;
        }
        ap=ap*ap;
        ap%=MOD;
        k/=2;
    }
    return ans;
}
ll inv(ll a){
	return powmod(a, MOD-2);
}
int main()
{
	int n, m; ll p;
	cin>>n>>m>>p;
	p=p*inv(100ll)%MOD;
	ll f[100001]; f[0]=1;
	for(ll i=1; i<=m+n; i++) f[i]=f[i-1]*i%MOD;
	ll invf[200001];
	invf[m+n]=inv(f[m+n]);
	for(ll i=m+n-1; i>=0; i--) invf[i]=invf[i+1]*(i+1)%MOD;
	ll s[100001]; s[0]=0;
	for(int i=0; i<n; i++){
		ll v; cin>>v; s[i+1]=s[i]+v;
	}
	ll ans=0;
	ll ps=0;
	for(int i=0; i<=n-1; i++){
		ll q=f[i+m-1]*invf[i]%MOD*invf[m-1]%MOD*powmod((1-p+MOD)%MOD, (ll)i)%MOD*powmod(p, (ll)m)%MOD;
		ps=(ps+q)%MOD;
		ans+=(q*s[i]%MOD);
		ans%=MOD;
	}
	ans+=((1-ps+MOD)%MOD*s[n]%MOD);
	ans%=MOD;
	cout<<ans<<endl;
	return 0;
}