Answer: a) you should invest project A
Step-by-step explanation:
It is far more better to invest the $100,000 into project A because:
i) project A has higher probability of success whrn compared to project B (0.7 to 0.6). i.e it is more likely to succeed when you invest in project A than B.
ii) project A has higher interest/values when it succeeds
than project B ( $200,000 to $100,000). i.e success of project A brings about more interest.
iii) project A also have high scrap value when it fails than project B ( $50,000 to $30,000)
I believe with all these reasons it is better to invest in project A.