prob(even or Less than 5)= prob(even) + prob(<5)= 5/10 + 4/10 = 9/10 =4/5
[tex]\begin{gathered} Total\text{ outcome=\lbrack{}1,2,3,4,5,6,7,8,9,10\rbrack} \\ \text{Even}=\lbrack2,4,6,8,10\rbrack\text{ , so, Prob(Even)=}\frac{\lbrack2,4,6,8,10\rbrack}{\lbrack1,2,3,4,5,6,7,8,9,10\rbrack}=\frac{5}{10} \\ \text{Less than 5=\lbrack{}1,2,3,4\rbrack so, Prob(<5)=}\frac{\lbrack1^{\prime}2^{\prime}3^{\prime}4\rbrack}{1,2,3,4,5,6,7,8,9,10\rbrack}=\frac{4}{10} \end{gathered}[/tex][tex]\text{Prob(even or <5)= prob(even) +prob(<5)=}\frac{5}{10}+\frac{4}{10}=\frac{9}{10}=\frac{4}{5}[/tex]
