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Exact model

An ace from a standard deck

Probability:
7.69%
Odds:
1 to 12
dBan
−10.8 dBan

Turn over one card: any of the four aces counts, giving one chance in thirteen.

Calculation

p = 4 aces / 52 cards = 1/13

Assumptions

A well-shuffled standard 52-card deck gives every card the same chance.

Sources

  1. Standard-deck model

Explore on the scale

  • At least one ace in five cards
  • The ace of spades from a deck
  • A 2–10 card from a standard deck
  • A natural blackjack from a six-deck shoe