The sample space of an experiment is S={a, b, c, d, e, f}. What is the probability of picking a consonant? Write your answer in the simplest fraction form.

There are 6 possible outcomes and 2 of them are vowels (a and e). Therefore, there are 4 consonants (b, c, d, f) out of the 6 possible outcomes. Then, the probability of picking a consonant is:

4/6 = 2/3

So the probability of picking a consonant is 2/3 or approximately 0.67.