The probability of drawing a spade from a well-shuffled deck of 52 cards is 1/4 or one-fourth or 25%.
In a standard deck of playing cards, there are four suits: hearts, diamonds, clubs, and spades. Each suit consists of 13 cards, including numbered cards 2 through 10, along with the face cards (jack, queen, king) and the ace.
To find the probability of drawing a spade from a well-shuffled deck, you can use the formula:
Probability = Number of Favourable Outcomes/Total Number of Outcomes
In this case, the number of favourable outcomes is the number of spades, which is 13, and the total number of outcomes is the total number of cards in the deck, which is 52.
Probability of Spade = 13/52 = 1/4
So, the probability of drawing a spade from a well-shuffled deck of 52 playing cards is 1/4 i.e. one-fourth or 25%.