# ShowRand

from random import randint as randi
from random import uniform as randu

N = 100000
count=0
for k in range(N):
    x = randu(0,100)
    if 10<=x<=30 or 40<=x<=7:
        count +=1
print float(count)/float(N)

count=0
for k in range(N):
    x = randu(0,100)
    if 10<=x<=50 and  20<=x<=60:
        count +=1
print float(count)/float(N)

count=0
for k in range(N):
    x = randi(1,20)
    if x%2==1:
        count +=1
print float(count)/float(N)

count=0
for k in range(N):
    x = randi(1,20)
    if 13<=x<15:
        count +=1
print float(count)/float(N)