What is the upper control limit for a c-chart if the total defects found over 20 samples equals 150? Marketing Supply Chain What is the upper control limit for a c-chart if the total defects found over 20 samples equals 150?a) 7.5b) 2.739c) 15.72d) 20e) 30Answer: c Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+