Question Number 134117 by ClarkeMelodyWenkeh last updated on 27/Feb/21
Answered by TheSupreme last updated on 28/Feb/21
$${A}=\mathrm{15} \\ $$$${B}=\mathrm{10} \\ $$$${A}\cup{B}={A}+{B}−{A}\cap{B}=\mathrm{20} \\ $$$${A}\cap{B}=\mathrm{15}+\mathrm{10}−\mathrm{20}=\mathrm{5} \\ $$$${p}\left({A}\cap{B}\right)=\frac{{A}\cap{B}}{{A}\cup{B}}=\frac{\mathrm{1}}{\mathrm{4}} \\ $$