Brain-Teaser 451

From The Sunday Times, 4th January 1970 [link]

The final weeks of the University soccer tournament proved unusually exciting this year. With only four games left, Arts, Biology and Classics had drawn clear and were battling for the honours. The position then was that Biology were top with 32 points, Arts second also with 32 points, and Classics third with 30 points.

All three teams had scored 70 goals, but Classics had conceded 35 goals giving them an inferior goal average (i.e. ratio of goals for and against) to both Arts and Biology.

The remaining games required Classics to play both Biology and Arts, who each also had to play one game against another team lower in the division.

It turned out that after the four games, Arts had failed to score and, although having scored five of the total of ten goals scored, Classics worsened their goal average.

Consequently, all three teams finished with the same number of points, but Arts won the league from Classics on goal average.

What were the final goals for and against for each team?

A prize of £3 was offered for this puzzle.

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