200 elementary school students were surveyed to find their blood groups. of those, 55 were of blood group a, 85 of blood group b, and 21 of blood group o. what is the probability that a randomly chosen student has either blood group a or blood group b? a) 0.25 eliminate b) 0.60 c) 0.70 d) 0.81

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%