Now
[tex]\\ \rm\Rrightarrow P(E)=\dfrac{|E|}{|S|}[/tex]
[tex]\\ \rm\Rrightarrow P(E)=\dfrac{7}{14}=1/2[/tex]
Answer:
[tex]\mathsf{Probability \ of \ an \ event \ occurring = \dfrac{Number \ of \ ways \ it \ can \ occur}{Total \ number \ of \ outcomes}}[/tex]
Given:
[tex]\implies \mathsf{Probability \ of \ red\ hair= \dfrac{7}{14}=\dfrac12=0.5}[/tex]