Face or ace given a red card
A card is drawn from a standard 52-card deck and you are told it is red. What is the probability it is either a face card (J, Q, K) or an ace? Give your answer as a decimal (to 4 decimals).
Show hints (2)+
- Condition first: the sample space is the 26 red cards.
- Count red face cards and red aces separately - they don't overlap.
Answer
Reveal answer →Final answer
0.3077 (± 0.001)
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Asked at: Game-Based Aptitude, Options Market-Making