19 (a) A bag contains these cards. 1 7 3 9 4 5 2 One of these cards is picked at random. Find the probability that the number on the card is greater than 3. ................................................. [1] (b) A box contains 3 blue cards and 7 red cards. Kim picks one card at random, notes its colour and then replaces it in the box. She then picks another card at random. (i) Complete the tree diagram. First card Second card 3 Blue 10 Blue 3 10 Red .......... 3 Blue 10 .......... Red Red .......... [1] (ii) Work out the probability that both of the cards Kim picks are blue. ................................................. [2] © UCLES 2023 0580/13/O/N/23 13