दिया है- \(\mathrm{P}(\mathrm{A})=0.8, \mathrm{P}(\mathrm{B})=0.5\)
अब \(\mathrm{P}(\mathrm{A} \cap \mathrm{B})=\mathrm{P}(\mathrm{A}) \times \mathrm{P}(\mathrm{B})=\frac{0.8}{10} \times \frac{0.5}{10}=0.40\)
अब \(\mathrm{P}(\mathrm{A} \cup \mathrm{B})=\mathrm{P}(\mathrm{A})+\mathrm{P}(\mathrm{B})-\mathrm{P}(\mathrm{A} \cap \mathrm{B})\)
\(=0.8+0.5-0.40\)
\(=0.90\)