t Daifu university, 40% of all students are both members of a student organization and want to reduce their tuition costs. 20% of those students who want to reduce tuition are not members of the student organization. What percentage of all Daifu students want to reduce tuition?
* 20%
* 30%
* 40%
* 50%
* 60%
* 20%
* 30%
* 40%
* 50%
* 60%
