Question

What is the probability that, by guessing at random one can correctly guess the month of birth of a stranger?

Answer 1

There's 12 months.
Person guesses 1 month.

So, the chances of correctly guessing is 1/12

Answer 2

there is a total of 12 months.....and 1 stranger
so the probability of guessing the birth month of a stranger is 1/12