To find the probability of randomly selecting a Spade or a face card given it's black, we need to determine the number of favorable outcomes and the total number of possible outcomes. Let's break it down step by step:
Step 1: Determine the number of favorable outcomes:
First, let's determine the number of black cards in a deck of 52 cards. In a standard deck, there are 26 black cards, which include 13 Spades (black suits) and 13 Clubs (black suits). Therefore, we have 26 favorable outcomes.
Next, we need to determine the number of face cards that are black. In each suit, there are three face cards: Jack, Queen, and King. So, there are a total of 12 face cards in the deck, out of which 6 are black (2 black face cards in each black suit). Therefore, we have 6 additional favorable outcomes.
Step 2: Determine the total number of possible outcomes:
In a standard deck of 52 cards, there are 52 possible outcomes.
Step 3: Calculate the probability:
The probability is the ratio of favorable outcomes to the total number of possible outcomes.
Probability = Number of favorable outcomes / Total number of possible outcomes
Probability = (26 + 6) / 52
Probability = 32 / 52
Probability = 8 / 13
So, the probability of randomly selecting a Spade or a face card given it's black is 8/13.
Please note that this calculation assumes that the selection is random and the deck of cards is well-shuffled.