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2007 AMC 10B Question 20

AMC10 · 2007 AMC 10B

Question 20

A set of $25$ square blocks is arranged into a $5\times 5$ square. How many different combinations of $3$ blocks can be selected from that set so that no two are in the same row or column?
  1. $100$
  2. $125$
  3. $600$
  4. $2300$
  5. $3600$