We are given that one scarf requires 3/5 yard of fabric.
We are also given that she has 1(7/10) yards of fabric. To know the number of scarves that she can make, we will divide the total fabric she has by the amount required for one scarf as follows:
number of scarves = (1(7/10)) / (3/5) = 2(5/6) scarves
Therefore, from the givens and based on the above calculations, the correct choice would be the third one.