An integer k is picked from 1 through 10 each is equally lik

An integer k is picked from 1 through 10 (each is equally likely). Anotherinteger n is then picked from 1 through k (again all choices are equallylikely). What is the probability that n is even.

Solution

probability that n is even = (5) / (10 ) = 1/2

5 because there are only 5 numbers even

and 10 because there are 10 numbers in total