The probability of picking a black ace in one random draw from a normal pack of playing cards is 1/26.
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In a standard deck of 52 cards, there are 4 aces and 4 queens, so the probability of picking an ace or queen is 8 in 52, or 2 in 13, or about 0.1538.
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.
The probability of pick a red ace out of a standard deck of cards would be 1/26 because there are two read aces, the ace of diamonds and the ace of hearts.
1/52 or one out of fifty-two
The chance of picking a heart is 1/4 as there are four suits. The chance of picking an ace is 1/13, as there are 4 aces in a deck of 52. If I want the probability of drawing a heart of an ace, I can add these probabilities together, but I have double counted on possibility, the ace of hearts. So: Probability = 4/52 + 13/52 - 1/52 = 16/52 or 4/13 Probability = 0.308 expressed as a fraction.