What is the probability of drawing a 9 from a deck of cards?

36/52 is 9/13.

Read more

One may also ask what are the chances of picking the same card twice?

If you draw the same card twice, you must have replaced the firstcard you drew. The probability of drawing the second time the same card as the first is 1/44=0.02272=2.272%. What is the probability of picking a card out of a pack of 52 cards that is red or black? In a standard deck of playing cards there are 26 red/white cards and 26 black cards. There is an equal chance of pulling either color. Therefore it is 50% chance a red card ; 50% chance it is a black card.

What is the probability of getting either a nine or an ace when drawing a single card from a deck of 52 cards?

52 cards in a deck; 13 are spades; 4 are aces. Probability of a single card being a spade is therefor 13/52, or 1 out of 4 (25%). Probability of a single card being an ace is 4/52 or about 7.7%. Consequently, what is the probability of first drawing the ace of spades and then drawing any of the three remaining aces from a 52-card pack?

Keeping this in consideration, what are the odds against drawing an ace?

The chances of getting an ace in a deck would be 13 / 52 or 1/4. The odds against getting an ace would mean the chances of not getting an ace which would be 1 - 1/4 = 3/4. Probability of getting an ace from a regular deck of 52 cards = 4/52 = 1/13 .