your CFO has produced a scenario analysis for a potential capital budgeting project. The following probability distribution demonstrates the results of the scenario analysis:

probability : 0.25,0.5,0.25

NPV: ($20,000),$15,000,$50,000

Given this information, what is the standard deviation for this project ?

a)$25,784.22

b)$28,756.34

c)$24,748.74

d)none of the answer