A tank has two inlet pipes A and B and an outlet pipe C. A takes 5 hours to all up the tank. B takes 8 hours to fill it up and outlet C takes 13 hours 20 minutes to empty the full tank. Pipe A opened first and the tank starts filling up. After 50 minutes. pipe B also opened. If outlet is opened iter another 80 minutes how many more minutes will it take to fill up the tank if you answer the question I will mark as brainliest

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?