A researcher identifies a sample of teenagers and chooses two males, age 16 years old, from lower-income families. She randomly selects one of the males
to be in an intensive tutoring course; she places the second male in a
standard classroom. She continues doing this with pairs of males and
females. This is an example of:

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?