1/52
1/52. Only one card, the Jack of diamonds, will satisfy your requirements.
Since half of the cards (26 of the 52) are a red card (hearts and diamonds) the odds are 1 in 2 (or 50%) that any given card will be red.
The probability of picking one red card of a deck of 52 playing cards is 26 out of 52, or 1 out of 2.
The probability is one in fifty-two.
A standard deck of playing cards contains 52 cards, with 26 red cards (hearts and diamonds) and 26 black cards (clubs and spades). There are no green cards in a standard deck. Therefore, the probability of randomly picking a green card from a standard deck is 0%.
The probability of picking a diamond out of a standard deck of 52 cards is 13 in 52, or 1 in 4, or 0.25.
In a standard deck of 52 playing cards, there are 13 hearts. To find the probability of picking a heart card, you divide the number of heart cards by the total number of cards. Therefore, the probability is 13/52, which simplifies to 1/4 or 25%.
3 out of 13
1 in 52, or 0.01923
1-52
12/52nd
If it is an ordinary pack of playing cards then the probability is 0.5