"\\begin{array}{c:c:c}\n X & P(X) & XP(X) \\\\ \\hline\n 1100 & 0.2 & 220 \\\\\n \\hdashline\n 400 & 0.5 &200\n\\\\ \\hdashline\n -800 & 0.3 & -240\n\\\\ \\hline\n Total &1 & 180\n\\end{array}"
"1100(0.2)+400(0.5)-800(0.3)=180" Expectation is a increase of 180.
Comments
Leave a comment