4/52 or 1/13.
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The probability of drawing an Ace from a standard deck of 52 cards is 4 in 52, or 1 in 13.
The probability of drawing a queen, king, or ace from a standard deck of 52 cards is 12 in 52, or 3 in 13, or about 0.2308.
The probability of drawing an Ace in a standard deck of 52 cards is 4 in 52, or 1 in 13, or about 0.07692.
The probability of drawing an Ace or a Deuce from a standard deck of 52 cards is 8 in 52, or 2 in 13, or about 0.154.
There are 13 of each suit in a standard deck of cards. Assuming there are no jokers, the probability of picking either a club or a diamond is (13+13)/52 or 0.5. There are also four aces in a standard deck. However, we've already accounted for two of them (the ace of clubs and the ace of diamonds), so we're only adding two additional possibilities. The probability of choosing an ace, a club, or a diamond from a standard deck is therefore 28/52 (you can figure the decimal value yourself).