(a)[1]
Adam has a bag with 9 balls, labelled from 1 to 9. Adam chooses a ball at random from the bag and then puts it back. Find the probability that the ball has an odd number.
(b(i))[1]
Adam takes a ball from the 9 balls in the bag, records the number and then replaces it. He then takes a second ball from the bag, records the number and replaces it again. Work out the probability that both numbers are odd.
(b(ii))[2]
Work out the probability that one number is odd and the other is even.
(c)[3]
Adam now takes two balls from the 9 balls in the bag, without replacement. Work out the probability that the two numbers are either both odd or both even.