Question 946707
Expected score:
{{{E=1(0.19)+2(0.47)+3(0.34)}}}
{{{E=0.19+.94+1.02}}}
{{{E=2.15}}}
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Standard deviation:
{{{sigma^2=(1-2.15)^2(0.19)+(2-2.15)^2(0.47)+(3-2.15)^2(0.34)}}}
{{{sigma^2=0.2513+0.01058+0.24565}}}
{{{sigma^2=0.5075}}}
{{{sigma=0.71}}}