Brain Teasers & Mental Math
Draw two cards from a standard 52-card deck without replacement. What is the probability they are the same suit?
Model answer
4/17 ≈ 23.5%.
The first card can be anything — it just sets the suit. Then 12 of the remaining 51 cards match it: P = 12/51 = 4/17.
Longer route (same answer): 4 suits × C(13,2)…
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