A random sample of student surveyed at Miles Middle School show that 15 students like steak fingers, 35 students like hamburger, and 25 like pepperoni pizza. If there are 300 students enrolled at middle school, Determine the number of students at the school that will like hamburger.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?