You reach into a jelly bean bag and grab one bean. If the bag contains 30 red, 25 orange, 15 pink, 10 green and 5 black beans, what is the
probability that you will get a black bean or a red bean is nearest to
A) 0.3
B) 0.5
C) 0.6
D) 0.4

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)