A marketing report concerning personal computers states that 650,000 owners will buy a printer for their machines next year and 1,250,000 will buy at least one software package. If the report states that 1,450,000 owners will buy either a printer or at least one software package, how many will buy both a printer and at least one software package?
can anyone help me for solving this?
$A:\;$ The set of all owners who buy a printer. $\;|A| = 650,00$
$B:\;$ The set of all owners who buy at least one software package. $\;|B| = 1,250,000$
$A \cup B:\;\;$ The set of all owners who buy a printer OR at least one software package. $\qquad\qquad|A \cup B| = 1,450,000$
$A \cap B: $ The set of all owners who buy a printer AND at least one software package.