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Mistake in schweser's notes alternative investment

Q, venture capital, initial investment 1 million. failure rate over next 4 years, .10, .15, .20, .15
expected payoff is 5 million in 4 years, cost of capital is 10% (SS18, reading 73, alternative investment question 11, 2009 shweser )
Whats the expected NPV?
A: 366,067
B: 775,834
C: 698,057
my answer: suvival rate=0.9*0.85*0.8*0.85=0.52. failure rate=0.48
NPV=weighted average of two possiblities
NPV= 0.52* 5,000,000/1.1^4 (~1.7 million)  0.48*1000,000
shweser’s answer
NPV= 0.52* 5,000,000/1.1^4 (~1.7 million)  1000,000=0.7 mil–answer B
this cant be right.

thanks for the reply above, so can anyone now explain on page 217 of the cirriculum Volume 6 example 5. why the initial 1 million outflow is multiplied by the probablity of failure? i.e 1,000,000x80.8%?

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