From a standard 52-card deck, what is the probability of drawing a red card?
Aptitude
Probability
Difficulty: Easy
Choose an option
Answer
Correct Answer: 1/2
Explanation
Introduction / Context:A standard deck has equal numbers of red and black cards, making this a symmetry-based probability.
Given Data / Assumptions:
- Standard deck: 52 cards.
- Red suits: hearts and diamonds (26 cards total).
Concept / Approach:P(red) = number of red cards / total cards = 26 / 52.
Step-by-Step Solution:Probability = 26/52 = 1/2.
Verification / Alternative check:P(black) = 26/52 = 1/2; the two are complementary and sum to 1.
Why Other Options Are Wrong:1/13 corresponds to a specific rank in a suit; 1/4 is a single suit; 2/18 is nonsensical for a 52-card deck.
Common Pitfalls:Confusing suit probabilities (1/4) with colour probabilities (1/2).
Final Answer:1/2