CAT Quant Practice Problems

Question: Each of the 11 letters A, H, I, M, O, T, U, V, W, X and Z appears same when looked at in a mirror. They are called symmetric letters. Other letters in the alphabet are asymmetric letters.

How many three-letter computer passwords can be formed (no repetition allowed) with at least one symmetric letter?

  1. 990
  2. 2730
  3. 12870
  4. 15600

Correct Option:3

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CAT Quant Practice Problems
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