Answer: 25%
Explanation:
There are 52 cards in a deck. Half of them are red and half of them are black, so there is a 50% or 1/2 probability you will choose a red card at first. You put the card back, so the second time there is still a 50% or 1/2 probability you will pick a red card. You would then multiply theses two probabilities together.
1/2x1/2=1/4
1/4 is also 25%