The odds of drawing a queen is 4 in 52, or 1 in 13. The odds of drawing a heart is 13 in 52, or 1 in 4. The odds, then, of drawing a queen or a heart is (4 + 13 - 1) in 52, or 16 in 52, or 4 in 13. (The reason for subtracting one is to account for the queen of hearts, which is both a queen and a heart.)
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1 in 13 - one out of every 13 cards is a queen.
The probability of drawing a queen or a four from a standard 52 card deck is 8 in 52, or 2 in 13, or about 0.1538.
The odds against drawing a black 7 is 25 in 26.
The odds of not selecting a queen of hearts is 51 in 52.
A deck of cards consists of four different suits: hearts, clubs, spades and diamonds. Each suit is represented evenly in the deck, so the odds of drawing a heart are 1 in 4.