There are seven discs in a bag.
Two discs are numbered 10, three discs are numbered 20, and two discs are numbered 30.
Maya takes a disc at random from the bag. She does not replace it. Maya then takes another disc at random from the bag.
Calculate the probability that both discs have the same number on them.
Calculate the probability that the number on the second disc Maya takes is greater than the number on the first disc she takes.
