17. An elevator in a mall has a capacity of 1350 kg, Suppose that on the average, a child weighs about 25 kg while an adult weighs 60 kg. How many possible number of children and adults are
allowedto ride the elevator without exceeding its capacity?
a. (30 children, 15 adult)
c.(2 children, 25 adult)
b. (10 children, 15 adult)
d.(5 children, 24 adulky​

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?