tickets to see a school play cost $3 for students and $8 for adults. On opening night, $1,000 was collected and 150 tickets were sold. Use substitution to solve a system of equations to find how many of each kind of ticket were sold?

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.