Final answer:
The probability of drawing a ten or a spade from a deck of 52 cards is 4/13.
Step-by-step explanation:
To find the probability of drawing a ten or a spade from a pack of 52 cards, we need to determine the number of favorable outcomes and the total number of possible outcomes.
There are 4 tens and 13 spades in a deck of cards, but we need to subtract the common card (10 of spades) to avoid double counting.
Therefore, the total number of favorable outcomes is 4 + 13 - 1 = 16.
The total number of possible outcomes is 52 since there are 52 cards in a deck.
So the probability of drawing a ten or a spade is 16/52, which simplifies to 4/13.