Consider this experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of the stated event.

A card that is not a king and not a spade is drawn.
My answere: 36/52 18/26 9/13 =69%
Is this right?
Thanks.

Correct!

Yes, your answer is correct. To determine the probability of drawing a card that is not a king and not a spade, you need to first determine the number of favorable outcomes and the total number of possible outcomes.

There are 52 cards in a standard deck. However, there are 4 kings in the deck, so the number of cards that are not kings is 52 - 4 = 48. Similarly, there are 13 spades in the deck, so the number of cards that are not spades is 52 - 13 = 39.

To find the number of cards that are not a king and not a spade, you need to subtract the number of cards that are both kings and spades. Since there are 4 kings and one of them is a spade, the number of cards that are both kings and spades is 1.

So, the number of favorable outcomes (cards that are not a king and not a spade) is 48 - 1 = 47.

The total number of possible outcomes is still 52.

Therefore, the probability of drawing a card that is not a king and not a spade is 47/52, which simplifies to 9/13 or approximately 0.6923, which is approximately 69%.