Two friends were born in the year 2000 what is the probability that they have different birthday

Which of the following arguments are correct and which are not correct ? Give reasons for your answer.

If a die is thrown once, the possible outcomes areS = {1, 2, 3, 4,5, 6} i.e.    n(S) = 6Let A be the favourable outcomes of getting add number. ThenA = {1,3,5} i.e.    n(S) = 3

Therefore, P(A) = 

Answer