Rajit buys 4 pairs of socks for $2.50 per pair. he pays with a $20 bill.
exactly how much change will he receive? use the appropriate technique(s) to solve the problem.

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.