6. A customer placed an order with a bakery for
cupcakes. The baker has completed 37.5%
of the order after baking 81 cupcakes. How
many cupcakes did the customer order?

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?