Question

A sample poll of 100 voters revealed the following information concerning three candidates A, B, and C who were running for three offices. 10 voted in favor of both A and B, 35 voted in favor of A or B but not C, 25 voted in favor of B but not A or C, 65 voted in favor of B or C but not A, 25 voted in favor of C but not A or B, 0 voted in favor of A and C but not B. How man voters did not favor any of the candidates