The Expected value of a probability distribution is calculated by multiplying the Value by their probability and taking the sum.
[tex]E(x)=\sum ^{\square}_{\square}p(x_i)\times X_i[/tex][tex]\begin{gathered} E(x)=1(0.12)+4(0.2)+6(0.38)+8(0.2)+10(0.1) \\ =0.12+0.8+2.28+1.6+1 \\ =5.8 \end{gathered}[/tex]Hence the Expected value is 5.80