﻿from random import *
from math import *

def X():
    x=0
    for j in range(3):
        x=x+randint(0,1)
    return x

def Ecart(n):
    somme=0
    for i in range(n):
        somme=somme+X()
    m=somme/n
    d=abs(m-1.5)
    return d

def Proportion(n,N,k):
    s=sqrt(0.75)
    l=0
    for j in range(N):
        if Ecart(n)<=k*s/sqrt(n):
            l=l+1
    p=1/N
    return p

