Sarah has two bags of numbered discs, Bag A and Bag B. There are three discs in each bag.
Bag A contains discs with numbers 2, 4, and 5.
Bag B contains discs with numbers 3, 6, and 8.
Sarah takes a disc from Bag A and a disc from Bag B. She multiplies the numbers on the two discs to get a total score.
Work out the probability that the total score is an even number.