\[\boxed{\mathbf{267.}}\]
\[\textbf{а)};б)\]
\[X - EX\] | \[- 1,5\] | \[- 0,5\] | \[0,5\] | \[1,5\] |
---|---|---|---|---|
\[(X - EX)^{2}\] | \[2,25\] | \[0,25\] | \[0,25\] | \[2,25\] |
\[Вероятность\] | \[0,2\] | \[0,3\] | \[0,3\] | \[0,2\] |
\[\textbf{г)}\ \sqrt{1,05} \approx 1,025.\]