[填空题]
During an exam that has a tota z/fsyy4+0td(s nv( lml ofx /naewlj6hig /06ll7 eight questions, Paula correctly solved Questions 3,4,6,7 and 8 . During the same exam, Quentin correctly solvejwll i0h //ge6 n6l7axd 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.
