A shipping compary hancles containers is three dfferent wives $,$ and $)=(3,2,7$ dene

${}_1=220,{}_2=250,{}_3=150$

${}_1=11,{}_2=12,{}_3=6$ expected value $n^3$ verlance $n^6$

$($b$)$ Would your calculations necessarily be correct if the Xjs were not independent? faplain.

Fether the expected walue nor the werlance woid be correct.

The expected vilue woild not bi correct, to the usiance wodd be cerect.

The expected walue would be corred, but the virlance would net be correct.

Both the expected value and the varlance mold te correct.