[填空题]
During an exam that has a total of eig* kfvsju m3vrne 0g6+:2kwc9tht questions, Paula correctly soweda +ib9l38x lved Questions 3,4,6,7 and 8 . During the s8di ae+x w39blame exam, Quentin correctly solved Questions 1,2 3,6 and 8 .
1. Represent this information on the Venn diagram below. P represents the
set of questions correctly solved by Paula. Likewise, Q represents the set of questions correctly solved by Quentin.
2. Find $n(P \cup Q)$ .
3. Find the probability that a question at random has been solved correctly by Paula or Quentin, but not both.
