The instructions state that Deepthi needs 4/17 square yards of one type of material and 3/10 square yards of another type of material for a project. She buys exactly that amount. After finishing the project, however, she has 9/30 square yards left that she did not use. What is the total amount of square yards of material Deepthi used?	Choose the most appropriate option
A) 1 / 12  B) 4 / 17  C) 2 / 3  D) 1 1 / 9  E) 2 1 / 9

Rationale: total bought = 4 / 17 + 3 / 10 left part 9 / 30 - - - > 3 / 10 so used part 4 / 17 + 3 / 10 - 3 / 10 = 4 / 17 answer : b
Answer: B