Sammy has three times as many nickels as quarters and twice as many dimes as quarters if he has 1.80 all together then how many nickels does he have

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%