A set of 5 cards, each labeled with the letters A, B, C, D and E, is placed in a hat and two selected at random without replacement. Find the probability of getting D and E.

Answer: 1/10
Thanks for any help

1 answer

You are choosing pairs from 5 cards
= C(5,2) = 10
the pair of DE is one of those, so

prob(DE) = 1/10