return=200 if success, return=0,otherwise.without reading newspaper, the prior belief is 1/2,the expected value:1/2*200+1/2*0=100
with newspaper, if news is good, the probability of success is 3/4,if news is bad,the probability of success is 1/4.
the probability of having good news is 1/2,
what's the value of the information?
我自己算得是0，求指正