Multiple choice

If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is -

  1. 4/20

  2. 4/13

  3. 9/26

  4. 3/12

  5. 2/8
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total cards = 52. Spades = 13. Kings = 4. One king is a spade. Probability = (P(Spade) + P(King) - P(Spade and King)) / 52 = (13 + 4 - 1) / 52 = 16/52 = 4/13.

AI explanation

Using the addition theorem of probability, the probability of drawing a spade or a king is P(spade) + P(king) - P(king of spades). A standard deck has 52 cards, so this becomes 13/52 + 4/52 - 1/52. The result is 16/52, which simplifies to 4/13.

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