It is 1/52.
1 in 52, or 0.01923
1/52
The probability is 0.25
The probability of picking one red card of a deck of 52 playing cards is 26 out of 52, or 1 out of 2.
there are 4 1's or aces in a pack of 52 cards. Probability of picking an ace=4/52=1/13
The probability of picking a black ace in one random draw from a normal pack of playing cards is 1/26.
If it is an ordinary pack of playing cards then the probability is 0.5
1 in 52
13/52 = .25
The probability of drawing an Ace from a standard deck of 52 cards is 4 in 52, or 1 in 13, or about 0.07692.
1/52. Only one card, the Jack of diamonds, will satisfy your requirements.
1/2 or 0.5.