import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }


enum MO = 10L^^9 + 7;
enum LIM = 3 * 10^^5;

long[] inv, fac, invFac;
void prepare() {
  inv = new long[LIM];
  fac = new long[LIM];
  invFac = new long[LIM];
  inv[1] = 1;
  foreach (i; 2 .. LIM) {
    inv[i] = MO - ((MO / i) * inv[cast(size_t)(MO % i)]) % MO;
  }
  fac[0] = invFac[0] = 1;
  foreach (i; 1 .. LIM) {
    fac[i] = (fac[i - 1] * i) % MO;
    invFac[i] = (invFac[i - 1] * inv[i]) % MO;
  }
}
long binom(long n, long k) {
  if (0 <= k && k <= n) {
    assert(n < LIM);
    return fac[cast(size_t)(n)] * invFac[cast(size_t)(k)] % MO * invFac[cast(size_t)(n - k)] % MO;
  } else {
    return 0;
  }
}


int N, M;
long P;
long[] V;

void main() {
  prepare();
  
  try {
    for (; ; ) {
      N = readInt();
      M = readInt();
      P = readLong();
      V = new long[N];
      foreach (i; 0 .. N) {
        V[i] = readLong();
      }
      V.sort;
      V.reverse;
      
      auto PP = new long[LIM];
      auto QQ = new long[LIM];
      PP[0] = QQ[0] = 1;
      PP[1] = (P * inv[100]) % MO;
      QQ[1] = 1 - PP[1];
      foreach (j; 2 .. LIM) {
        PP[j] = (PP[j - 1] * PP[1]) % MO;
        QQ[j] = (QQ[j - 1] * QQ[1]) % MO;
      }
      
      // (M, 0), (M, 1), ... or (0, N), (1, N), ...
      auto prob = new long[N + 1];
      prob[0] = PP[M];
      foreach (i; 1 .. N) {
        prob[i] = ((binom(M + i, M) - binom(M + i - 1, M)) * ((PP[M] * QQ[i]) % MO)) % MO;
      }
      prob[N] = 1;
      foreach (i; 0 .. N) {
        prob[N] -= prob[i];
        prob[N] %= MO;
      }
      
      auto VSum = new long[N + 1];
      foreach (i; 0 .. N) {
        VSum[i + 1] = (VSum[i] + V[i]) % MO;
      }
      
      long ans;
      foreach (i; 0 .. N + 1) {
        ans += prob[i] * VSum[i];
        ans %= MO;
      }
      ans = (ans % MO + MO) % MO;
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}