After doing 3/5 of the Biology homework on Monday night, Sanjay did 1/3 of the remaining homework on Tuesday night. What fraction of the original homework would Sanjay have to do on Wednesday night to complete the Biology assignment ? Choose the correct choice.
A) 1/15  B) 2/15  C) 4/15  D) 2/5  E) None of these
Sol.(c) Remaining homework on Monday night   = 1 - (3/5) = 2/5   Work done on Tuesday night   = 1/3 of 2/5 = 2/15   Remaining homework to complete the biology assignment   = 2/5 - 2/15 = (6 - 2)/15 = 4/15   Answer 4/15
<result>C</result>
After doing 3/5 of the Biology homework on Monday night, Sanjay did 1/3 of the remaining homework on Tuesday night. What fraction of the original homework would Sanjay have to do on Wednesday night to complete the Biology assignment ?