// URL: https://yukicoder.me/problems/no/766

import std.algorithm, std.array, std.container, std.math, std.range, std.typecons, std.string;

version(unittest) {} else
void main()
{
  int N, M, P; io.getV(N, M, P);
  int[] V; io.getA(N, V);

  V.sort!"a>b";

  auto w = new mint[](N);
  foreach (i; 0..N) w[i] = V[i];
  auto wc = w.cumulativeSum;

  auto pp = new mint[](M+1); pp[0] = 1;
  foreach (i; 1..M+1) pp[i] = pp[i-1] * P / 100;
  auto p1p = new mint[](N+1); p1p[0] = 1;
  foreach (i; 1..N+1) p1p[i] = p1p[i-1] * (100-P) / 100;

  auto fact = Fact!mint(N+M);

  auto r = mint(0);
  foreach (i; 0..M)
    r += wc[0..N] * fact.combi(N-1+i, i) * p1p[N] * pp[i];
  foreach (i; 0..N)
    r += wc[0..i] * fact.combi(M-1+i, i) * p1p[i] * pp[M];

  io.put(r);
}

class CumulativeSum(T)
{
  const size_t n;
  T[] s;

  this(T[] a)
  {
    n = a.length;
    s = new T[](n+1);
    s[0] = 0;
    foreach (i; 0..n) s[i+1] = s[i]+a[i];
  }

  pure T opSlice(size_t l, size_t r) { return s[r]-s[l]; }
  pure size_t opDollar() { return n; }
}
CumulativeSum!T cumulativeSum(T)(T[] a) { return new CumulativeSum!T(a); }

struct Fact(T, bool inv = true)
{
  int n;
  T[] table;
  alias table this;
  static if (inv) T[] invTable;

  this(int n)
  {
    this.n = n;

    table = new T[](n+1); table[0] = 1;
    foreach (i; 1..n+1) table[i] = table[i-1]*i;

    static if (inv) {
      invTable = new T[](n+1); invTable[n] = T(1)/table[n];
      foreach_reverse (i; 1..n+1) invTable[i-1] = invTable[i]*i;
    }
  }

  static if (inv) {
    pure T perm(size_t a, size_t b) in { assert(n >= a && a >= b); } do
    { return table[a]*invTable[a-b]; }

    pure T combi(size_t a, size_t b) in { assert(n >= a && a >= b); } do
    { return table[a]*invTable[b]*invTable[a-b]; }

    pure T homo(size_t a, size_t b) in { assert(n >= a+b-1); } do
    { return combi(a+b-1, b); }
  }
}

const mod = 10^^9+7;
alias mint = ModInt!mod;
auto lowerBoundBy(alias conv = "a", alias comp = "a<b", R, T)(R a, T v)
{ return a.sortedTuple!(conv, comp).lowerBound(tuple(a.front, v)).map!"a[0]"; }

auto upperBoundBy(alias conv = "a", alias comp = "a<b", R, T)(R a, T v)
{ return a.sortedTuple!(conv, comp).upperBound(tuple(a.front, v)).map!"a[0]"; }

auto sortedTuple(alias conv = "a", alias comp = "a<b", R)(R a)
{
  import std.functional;
  alias convFun = unaryFun!conv, compFun = binaryFun!comp;
  return a.map!(e => tuple(e, convFun(e))).assumeSorted!((a, b) => compFun(a[1], b[1]));
}

pure T isqrt(T)(T n)
{
  static if (is(T == int)) auto max = 46341;
  else static if (is(T == long)) auto max = 3037000500L;
  return iota(T(0), max).lowerBoundBy!("a^^2", "a<=b")(n).back;
}

pure T icbrt(T)(T n)
{
  static if (is(T == int)) auto max = 1291;
  else static if (is(T == long)) auto max = 2097152L;
  return iota(T(0), max).lowerBoundBy!("a^^3", "a<=b")(n).back;
}

pure T powr(alias pred = "a*b", T, U)(T a, U n, T one)
{
  import std.functional;
  alias predFun = binaryFun!pred;
  if (n == 0) return one;
  auto r = one;
  for (; n > 0; n >>= 1) { if (n&1) r = predFun(r, a); a = predFun(a, a); }
  return r;
}
pure T powr(alias pred = "a*b", T, U)(T a, U n) { return powr!(pred, T, U)(a, n, T(1)); }

pure T extGcd(T)(T a, T b, out T x, out T y)
{
  auto g = a; x = 1; y = 0;
  if (b) { g = extGcd(b, a%b, y, x); y -= a/b*x; }
  return g;
}

struct ModInt(int m, bool pos = false)
{
  version(BigEndian) union { long l; struct { int i2; int i; } } else union { long l; int i; }
  alias M = ModInt!(m, pos), Op = string;
  @property static init() { return M(0); }
  @property int value() { return i; }
  @property void value(int v) { i = nm(v); }
  alias value this;

  this(T)(T v = 0) { i = nm(v); }
  ref M opAssign(T)(T v) { i = nm(v); return this; }

  static if (!pos) pure M opUnary(Op op: "-")() { return M(-i); }

  static if (m < int.max / 2) {
    pure M opBinary(Op op)(int r) if(op=="+"||!pos&&op=="-") { return M(mixin("i"~op~"r")); }
    ref M opOpAssign(Op op)(int r) if(op=="+"||!pos&&op=="-") { i=nm(mixin("i"~op~"r")); return this; }
  } else {
    pure M opBinary(Op op)(int r) if(op=="+"||!pos&&op=="-") { return M(mixin("l"~op~"r")); }
    ref M opOpAssign(Op op)(int r) if(op=="+"||!pos&&op=="-") { i=nm(mixin("l"~op~"r")); return this; }
  }
  pure M opBinary(Op op: "*")(int r) { return M(l*r); }
  ref M opOpAssign(Op op: "*")(int r) { i=nm(l*r); return this; }

  pure M opBinary(Op op)(M r) if(op=="+"||!pos&&op=="-"||op=="*") { return opBinary!op(r.i); }
  ref M opOpAssign(Op op)(M r) if(op=="+"||!pos&&op=="-"||op=="*") { return opOpAssign!op(r.i); }

  pure M opBinary(Op op: "^^", T)(T n) { return this.powr(n); }

  static if (!pos) {
    pure M opBinary(Op op: "/")(M r) { return M(l*r.inv.i); }
    ref M opOpAssign(Op op: "/")(M r) { i=nm(l*r.inv.i); return this; }

    pure M opBinary(Op op: "/")(int r) { return opBinary!op(M(r)); }
    ref M opOpAssign(Op op: "/")(int r) { return opOpAssign!op(M(r)); }

    pure M inv() { int x = i, a, b; extGcd(x, m, a, b); return M(a); }
  }

  private
  {
    pure int nm(int v) { static if (pos) return v%m; else return (v%m+m)%m; }
    pure int nm(long v) { static if (pos) return cast(int)(v%m); else return cast(int)((v%m+m)%m); }
  }
}

auto io = IO!()();
import std.stdio;
struct IO(alias IN = stdin, alias OUT = stdout)
{
  import std.conv, std.format, std.meta, std.traits, core.stdc.stdlib;

  auto getV(T...)(ref T v) { foreach (ref w; v) get(w); }
  auto getA(T)(size_t n, ref T v) if (hasAssignableElements!T)
  { v = new T(n); foreach (ref w; v) get(w); }
  auto getC(T...)(size_t n, ref T v)
  if (allSatisfy!(hasAssignableElements, T))
  {
    foreach (ref w; v) w = new typeof(w)(n);
    foreach (i; 0..n) foreach (ref w; v) get(w[i]);
  }
  auto getM(T)(size_t r, size_t c, ref T v)
  if (hasAssignableElements!T && hasAssignableElements!(ElementType!T))
  { v = new T(r); foreach (ref w; v) getA(c, w); }
  template getS(E...)
  {
    auto getS(T)(size_t n, ref T v)
    { v = new T(n); foreach (ref w; v) foreach (e; E) mixin("get(w."~e~");"); }
  }

  const struct PutConf
  {
    bool newline = true, flush, exit;
    string floatFormat = "%.10f", delimiter = " ";
  }

  auto put(alias conf = "{}", T...)(T v)
  { mixin("const PutConf c = "~conf~"; putMain!c(v);"); }
  auto putB(alias conf = "{}", S, T)(bool c, S t, T f)
  { if (c) put(t); else put(f); }
  auto putRaw(T...)(T v) { OUT.write(v); OUT.writeln; }

  private
  {
    dchar[] buf;
    auto sp = (new dchar[](0)).splitter;
    void nextLine() { IN.readln(buf); sp = buf.splitter; }
    auto get(T)(ref T v) { if (sp.empty) nextLine(); v = sp.front.to!T; sp.popFront(); }

    auto putMain(PutConf c, T...)(T v)
    {
      foreach (i, w; v) {
        putOne!c(w);
        if (i < v.length-1) OUT.write(c.delimiter);
      }
      static if (c.newline) OUT.writeln;
      static if (c.flush) OUT.flush();
      static if (c.exit) exit(0);
    }
    auto putOne(PutConf c, T)(T v)
    {
      static if (isInputRange!T && !isSomeString!T) putRange!c(v);
      else if (isFloatingPoint!T) OUT.write(format(c.floatFormat, v));
      else OUT.write(v);
    }
    auto putRange(PutConf c, T)(T v)
    {
      auto w = v;
      while (!w.empty) {
        putOne!c(w.front); w.popFront();
        if (!w.empty) OUT.write(c.delimiter);
      }
    }
  }
}