A theater was designed with 15 seats in the first row, 19 in the second row, 23 in the third row, and so on. Write a function that represents this seating pattern to determine how many seats are in any row.
a(n) = 15 + 4(n)
O a(n) = 15 + 4(n-1)
an) = 23 + 4(n)
an) = 23 + 4(n-1)

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.