import matplotlib.pyplot as plt
a = 0.5
b = 0.75
nl = [1,10,100,1000,10000,100000]
N, n = 1000000, 0
def ex(N):
    n = 0
    for i in range(N):
        x = np.random.uniform(0,1)
        if x>a and x<b:
            n+=1
    return n/N
n2 = [ex(i) for i in nl]
plt.plot(nl,n2)
plt.show()