Question

If you choose randomly from a well-shuffled deck of 52 cards, what is the probability that the card chosen is red card or an ace?

Answer 1

The most straightforward way to get your answer:

Probability = (number of desired outcomes) / (all possible outcomes)

Here that means P = (cards you are interested in)/(total cards in deck)

Let's do an easier problem first:
How many cards in a deck are red? what is the probability of drawing a red card?

Answer 2

Find the probability of drawing 3 aces from a standard deck of cards without replacement? @mjdennis

Answer 3

Not really.

Answer 4

What? @mjdennis

Answer 5

Is this one question or two?

If there is only one question, there are 52 possible cards. 13 are hearts (red) and 13 are diamonds (red), so there are 26 ways out of 52 to draw a red card.

Answer 6

If it is OK to instead draw a black ace, now the probability is (26+___) / 52, right?

Answer 7

Not the same as drawing three aces, whole different problem...

Answer 8

It is a separate problem from the one that was first asked

Answer 9

Here is a different problem.
2 cards are drawn from a deck of 52 cards, with replacement. What is the probability they were both the King of Hearts?

Answer 10

@mjdennis

Answer 11

Draw 1 card. What is the probability it is KH (King of Hearts)?
Put the card back.
Draw 1 card. The probability draw 2 is KH is the same.
But the probability it happens twice is the product p1*p2. "and" conditions always involve multiplication.