import sys
input = sys.stdin.readline

mod=10**9+7
INV=pow(100,mod-2,mod)

FACT=[1]
for i in range(1,2*10**5+1):
    FACT.append(FACT[-1]*i%mod)

FACT_INV=[pow(FACT[-1],mod-2,mod)]
for i in range(2*10**5,0,-1):
    FACT_INV.append(FACT_INV[-1]*i%mod)

FACT_INV.reverse()

def Combi(a,b):
    if 0<=b<=a:
        return FACT[a]*FACT_INV[b]%mod*FACT_INV[a-b]%mod
    else:
        return 0

N,M,P=list(map(int,input().split()))
A=list(map(int,input().split()))

A.sort(reverse=True)

X=[0]*N

for i in range(N):
    X[i]=Combi(M-1+i,M-1)*pow(P,M,mod)*pow(100-P,i,mod)*pow(INV,M+i,mod)%mod

X.append((1-sum(X))%mod)

ANS=0
SUM=0

for i in range(N):
    SUM+=A[i]
    ANS+=X[i+1]*SUM%mod

print(ANS%mod)