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1989 AMC 12 Question 22

AMC12 · 1989 AMC 12

Question 22

A child has a set of $96$ distinct blocks. Each block is one of $2$ materials (*plastic, wood*), $3$ sizes (*small, medium, large*), $4$ colors (*blue, green, red, yellow*), and $4$ shapes (*circle, hexagon, square, triangle*). How many blocks in the set are different from the “plastic medium red circle” in exactly two ways? (The “wood medium red square” is such a block.)
  1. $29$
  2. $39$
  3. $48$
  4. $56$
  5. $62$