Answer
.25
Work Step by Step
In a deck of 52 cards, there are 13 diamonds. Thus, the probability is:
$$=\frac{13}{52}=\frac{1}{4}$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.