我的思路：（1）中只说了同时学习艺术和音乐的学生分别有多少百分比，根据韦恩图，无法知道一共有多少学生。所以，无法求知问题所问。请问老师，我的思路错在哪里了？？

Of the students in a certain school, 15 percent are enrolled in an art class and 10 percent are enrolled in a music class. What percent of the students in the school are enrolled in neither an art class nor a music class? (1) 2/3 of the students who are enrolled in an art class are also enrolled in a music class. (2)There are more than 100 students in the school. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. EACH statement ALONE is sufficient. Statements (1) and (2) TOGETHER are NOT sufficient.

我的思路：（1）中只说了同时学习艺术和音乐的学生分别有多少百分比，根据韦恩图，无法知道一共有多少学生。所以，无法求知问题所问。请问老师，我的思路错在哪里了？？