f A and B are two events with probability P$($A$)=0\mathrm{.}38,$P$($B$)=0\mathrm{.}63,$ P$($AUB$)=0\mathrm{.}78,$ P$($A$|$b$),$P$($B$|$b$\text{'}),$ P$($A inetectection b$\text{'}),$ P$($ A$\text{'}$ U B$\text{'})$