Example of how to calculate the intersection between two sets in python

### Intersection between two sets

Lets consider two sets:

`s1 = {1,2,3,4,5,6}`

`s2 = {4,5,6,7,8,9}`

To get the Intersection between s1 and s2, a solution is to use intersection():

`intersection_set = s1.intersection(s2)`

`print(intersection_set)`

which returns here

`{4, 5, 6}`

### Calculate the probability of the intersection of events s1 and s2

`import random`

`n = 100`

`n_intersection = 0`

`for i in range(100):`

`r1 = random.sample(s1, 1)[0]`

`r2 = random.sample(s2, 1)[0]`

`if {r1,r2}.issubset(intersection_set): n_intersection += 1`

`print(n_intersection/n)`

returns for example

`0.27`