Solution

Let $C_1, C_2$ be the two cold tablets and $A_1 ,A_2$ be the two aspirin tablets.

Let $xy$ represent the simple event that that $x$ and $y$

$y$ are swallowed by first and second patient, respectively. We have.

Answer

           P(A)=21​,P(C)=61​,​​P(B)=32​,P(A∩C)=0,​​P(A∩B)=31​,P(A∩B)=32​​P(A∪B)=65​,