Explanation:

Let’s break it down:

- Four teams: Chennai, Mumbai, Delhi, Kolkata. Each team plays every other team twice (one home, one away). That’s 3 opponents × 2 = 6 matches per team, 12 total matches.

- Scoring:

- +2 game points for each goal scored

- –1 game point for each goal conceded

- +5 table points for winning a match

- To qualify for finals, a team needs more than 10 table points

- Wins: Chennai = 3 wins, Mumbai = 5 wins, Delhi and Kolkata split the other (12 – 3 – 5 = 4) matches evenly: Delhi = 2 wins, Kolkata = 2 wins.

- Delhi vs. Kolkata: Their two matches were both draws.

Now, for the main question:

- Average table points of Mumbai and Chennai as a percentage of Chennai's points? (Match points, not game points, are relevant here.)

Let’s calculate:

- Mumbai: 5 wins × 5 = 25 table points

- Chennai: 3 wins × 5 = 15 table points

Average = (25 + 15) / 2 = 20

Percentage = (20 / 15) × 100 = 133.33...%, or 400/3%

Here’s the bottom line:

- Option 4 (400/3%) is exactly right.

This checks out with the calculations and how the points system is explained. Nice work.