MOD = 10 ** 9 + 7
MAX = 2 * 10 ** 5 + 10
modinv = lambda a, mod=MOD: pow(a, -1, mod)
fac, inv = [1] * MAX, [1] * MAX
for i in range(1, MAX):
    fac[i] = fac[i - 1] * i % MOD
    inv[i] = modinv(fac[i])


def comb(n, k, error=0):
    if not 0 <= k <= n:
        return error
    return fac[n] * inv[k] * inv[n - k] % MOD


N, M, P = map(int, input().split())
V = sorted(map(int, input().split()), reverse=True)
v_sum = 0
ans = 0

SUCCESS = (100 - P) * modinv(100) % MOD
FAILURE = P * modinv(100) % MOD

# ポイが尽きる場合
for i, v in enumerate(V):
    c = comb(M - 1 + i, i)
    ans += v_sum * c * pow(FAILURE, M, MOD) * pow(SUCCESS, i, MOD)
    ans %= MOD
    v_sum += v

# 全ての金魚を取りきる場合
for i in range(M):
    c = comb(N - 1 + i, i)
    ans += v_sum * c * pow(FAILURE, i, MOD) * pow(SUCCESS, N, MOD)
    ans %= MOD

print(ans)