5 Jasmine has one \(
) 5\( coin, two \)\\( 2\) coins and two \(
) 1\( coins. She selects two of these coins at random. The random variable \)X$ is the total value, in dollars, of these two coins.
- Show that \(\mathrm { P } ( X = 7 ) = 0.2\).
- Draw up the probability distribution table for \(X\).
- Find the value of \(\operatorname { Var } ( X )\).