Asapan investor bought 2,500 shares of a stock for $8 a share. he estimates the probability that the stock will rise to a value of $32 a share is 22%, and the probability it will fall to $3 a share is 78%. what is the expected value of the investor’s profit from buying the stock? a. $23,450b. $18,291c. $5,159d. $3,450

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?