Answer:
1/8
Step-by-step explanation:
Number of spades in a deck of cards = 13
Number of red cards in a deck of cards = 26
Total number of cards in a deck of cards = 52
So the probability of choosing a spade is;

After choosing the first card without replacing it, the total number of cards left will be 51, so the probability of choosing a red from 51 cards will be;

So the probability of choosing a spade and then, without replacement, a red card will be;

The probability of choosing a spade and then, without replacement, a red card is 1/8