Captain Blackbeard has 88 gold coins altogether.

The numbers on the treasure chests below show how many gold coins are in each chest.

Which two chests does Blackbeard has?

A. 23 B. 48 C. 93 D. 38

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?