Question: Which Opposing Team has an Against of 3, and a Date of 11 February 1950?
SQL: SELECT "Opposing Team" FROM "2-17215266-3" WHERE "Against" = 3.0 AND "Date" = '11 February 1950';

Question: Which Venue has an Opposing Team of Manchester United, and a Round of 5th Round Replay?
SQL: SELECT "Venue" FROM "2-17215266-3" WHERE "Opposing Team" = 'Manchester United' AND "Round" = '5th Round Replay';

Question: Which Against has a Date of 28 January 1950?
SQL: SELECT AVG("Against") FROM "2-17215266-3" WHERE "Date" = '28 January 1950';