Answer: Option '4' is correct.
Step-by-step explanation:
Since we have given that
Total number of games =50
Firstly, he played 20 games.
Percentage of games they won = 60%
Number of games they won is given by

Remaining number of games = 50-20=30
Percentage of remaining games they won = 80%
So, number of games they won is given by

So, total number of games they won is given by
12+24 = 36
So, Percentage of games they won for the entire season will be

Hence, Option '4' is correct.