Math problem please please help and explain if you can

correct answer will receive 10 points. I am so lost and have no clue how to even start this problem

http://img1.UploadScreenshot.com/images/…

I got this guys, I got this :) (lol)

Ok, so if you WIN, you get $7. but if you LOSE, you don't get anything and lose your $7
The probability of landing on red is 18/38.
Multiply the " amount of money when WIN" and "Probability when WIN" together.
Do the same thing for "LOSE"

WIN: 7*(16/38)
LOSE: -7(18/38)

7(16/38)-7(18/38)
= -0.36842105263

So rounded, I got -.37

ANSWER
-.37

Please pick me :) :D

yay thanks :)

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