Given \qquad m \angle QPSm∠QPSm, angle, Q, P, S is a straight angle. \qquad m \angle RPS = 6x + 11^\circm∠RPS=6x+11 ∘ m, angle, R, P, S, equals, 6, x, plus, 11, degrees \qquad m \angle QPR = 7x + 143^\circm∠QPR=7x+143 ∘ m, angle, Q, P, R, equals, 7, x, plus, 143, degrees Find m\angle RPSm∠RPSm, angle, R, P, S:

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected