I'll never get how GMATPrep counts score... Today took test, made 10 mistakes and got 49
Anyway, I didn't understand this oneEdited:
The same as http://www.gmatclub.com/forum/7/51865
finally. this one was kindof a dousy. Not the math part, just unwrapping what the statement says in order to figure out what it wants us to do!
.02I+ (100+.01I)/2 <-- this part took me a bit cause i didn't understand that its the average of 100 currency units + 1% of the income. I didnt catch that at first.
so make the denom equal.
(2(.02I)+ 100 +.01I)/2 --> (.04I+100+.01I)/2 --> .05I/2 +100/2
5I/100/2 +50 --> 5/100/2=1/20/2--> 1/40.