#include <bits/stdc++.h>
using ll = long long;
constexpr ll MOD = 1000000007;
ll power(const ll p, const ll n) { return n == 0 ? 1LL : n % 2 == 1 ? power(p, n - 1) * p % MOD : power(p * p % MOD, n / 2); }
ll inverse(const ll p) { return power(p, MOD - 2); }
int main()
{
    int N, M;
    ll P;
    std::cin >> N >> M >> P;
    P = (100 - P) * inverse(100) % MOD;
    std::vector<ll> v(N);
    for (auto& e : v) { std::cin >> e; }
    std::sort(v.begin(), v.end(), std::greater<ll>{});
    ll ans = 0;
    ll f = power(MOD + 1 - P, M), c = (MOD + 1 - f) % MOD;
    for (int i = 0; i < N; i++) { (ans += c * v[i] % MOD) %= MOD, (f *= (P * (M + i) % MOD) * inverse(i + 1) % MOD) %= MOD, (c += (MOD - f)) %= MOD; }
    std::cout << ans << std::endl;
    return 0;
}