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Math help!!! Expected Value


dragonkick

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their all correct, but im trying to figure out how did they get that answer for the one that circled. 

 

i hate school

 

shoot I forgot that's what it mean. Haven't used Pearson MyLabMath in awhile

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their all correct, but im trying to figure out how did they get that answer for the one that circled. 

 

i hate school

 

idk why they are using those huge fractions or weird notation.  but it should just be:

 

1 - the sum of the other probabilities.  

 

Then for total EV do x1*P(x1) + x2*(Px2) + ...... + etc

 

just do it in excel 

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idk why they are using those huge fractions or weird notation.  but it should just be:

 

1 - the sum of the other probabilities.  

 

Then for total EV do x1*P(x1) + x2*(Px2) + ...... + etc

 

just do it in excel 

That's presumably the most simplified fraction.

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