Question: A manufacturing plant has 350 special lamps on its production lines. On any day, each lamp could fail with probability p = 0:0017. These lamps are critical, and must be replaced as quickly as possible. It takes about one hour to replace a lamp, once it has failed. What is the probability that on any day the loss of production time due to lamp failures is k or fewer hours, k = 0; 1; 2; 3; 4; 5?