![Image](https://s7.postimg.cc/mu5som113/image011.png)
According to the graph above, what percent of people pay for graduate school through gifts/endowment?
A. 4
B. 5
C. 8
D. 10
E. 12
The OA is B.
The solution should be, 78+(x+4)+8+x=100, then x = (100-90)/2=5.
It is correct my solution? This PS question is very simple to solve it? Experts, can you give me other suggestion about the solution, please? Thanks.