Answer: 

Explanation:
Given : John rolls a six-sided number cube twice. 
Total number of outcomes on a fair cube = 6
When we roll two dices , then the total number of outcomes :-

Number of favorable outcomes of getting an even number and then an odd number :-
 [since there are 3 odd and 3 even numbers on it]
 [since there are 3 odd and 3 even numbers on it]
Now, the probability of getting an even number and then an odd number = 
