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so 30 total. a is sum of 0,1,2,3/30 so... 23/30, leaving the fractional simplification to you; b is 1,2/30 so 10/30 (a really easy one to simplify), and c is a trick as it's the same as a. err.. edit. 25/30.
Candypie2010 · 26-30, F
@stound ya i got 10/30 but its just going to equal 0 cuz 8/30 + 2/30 - 10/30 =0