A bag contains seven discs with numbers on them.
1,4,3,1,3,3,5 1, 4, 3, 1, 3, 3, 5 1,4,3,1,3,3,5One of the discs is selected at random.
Write down the probability that the disc has the number 3 on it.
Find the probability the disc has an odd number on it.