Members of the band sold 1150 worth of packages of pens and markers. They sold a total of 310 packages, including 10 more packag
es of pens than markers if one package of pens and one package of markers costs 7.50, what was the price of each package
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All the components in the state vector need to sum to 1. You're given that component corresponding to state 1 is 0.2, and that the component for state 3 is 0.
That leaves states 2 and 4, for which you're told that the component for state 2 is four times as large. If
is the component for state 
, then you have
which means
. So the state vector is 
.
That leaves states 2 and 4, for which you're told that the component for state 2 is four times as large. If
which means