Assume c and d function independently. for the system to function, either c or d must function. a. if the probability that c fails is 0.08 and the probability that d fails is 0.12, find the probability that the system functions. b. if both c and d have probability p of failing

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?