Vikki wants to determine whether students in her school would rather attend sporting event or a concert. which would be the best method for vikki to produce a representative sample?

a. randomly survey 50 students from each of the three grades at her school

b. randomly survey 20 students from each of the three grades at her school

c. randomly survey 50 students from her grade at her school

d. randomly survey 50 students at her school

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.