June 2023 Paper 3 Q11

11 A and B are mutually exclusive events.

Which one of the following statements must be correct?

Tick (✓) one box. [1 mark]

• \(\mathrm{P}(\mathrm{A} \cup \mathrm{B}) = \mathrm{P}(\mathrm{A}) \times \mathrm{P}(\mathrm{B})\)
• \(\mathrm{P}(\mathrm{A} \cup \mathrm{B}) = \mathrm{P}(\mathrm{A}) - \mathrm{P}(\mathrm{B})\)
• \(\mathrm{P}(\mathrm{A} \cap \mathrm{B}) = 0\)
• \(\mathrm{P}(\mathrm{A} \cap \mathrm{B}) = 1\)