The letter tiles W,I,D,S,O,M are placed on a box. Without looking, Abby picks a letter tile from the box. What is the probability that the letter she picks is a vowel? Write your answer in the simplest form of a fraction.
Out of the 5 letter tiles in the box, there are 2 vowels (I and O).
Therefore, the probability that Abby picks a vowel is 2/5 or 2:5 in simplest form.