#Combinationクラス
class Combination:

    def __init__(self, n, MOD):
        self.fact = [1]
        for i in range(1, n + 1):
            self.fact.append(self.fact[-1] * i % MOD)
        self.inv_fact = [pow(self.fact[i] ,MOD - 2 ,MOD) for i in range(n + 1)]
        self.MOD = MOD

    def factorial(self, k):
        '''k!を求める'''
        return self.fact[k]

    def inverse_factorial(self, k):
        '''k!の逆元を求める'''
        return self.inv_fact[k]

    def combination(self, k, r):
        '''kCrを求める'''
        return (self.fact[k] * self.inv_fact[k - r] * self.inv_fact[r]) % self.MOD


n, m, p = map(int, input().split())
v = list(map(int, input().split()))
MOD = 10**9 + 7
comb = Combination(n+m, MOD)

v = sorted(v, reverse = True)
point = [0]*(n+1)
for i in range(n):
    point[i+1] = point[i] + v[i]

ans = 0
ruiseki_p = 0
miss = (p * pow(100 ,MOD-2, MOD)) % MOD
miss = pow(miss, m, MOD)
tmp_success = (1 - miss) % MOD
success = pow((1 - miss) % MOD, MOD-2, MOD)
#0~n-1匹の金魚をすくう場合
for i in range(n):
    success *= tmp_success
    success %= MOD
    ans += miss * success * comb.combination(m-1+i, i) * point[i]
    ans %= MOD
    ruiseki_p += miss * success * comb.combination(m-1+i, i)
    ruiseki_p %= MOD

#n匹の金魚をすくう場合
if n != 1:
    ans += (1 - ruiseki_p) * point[n]

print(ans % MOD)