A school conducted a survey asking students to choose their favorite type of book. The students were divided into two groups: Group A and Group B. The number of students in Group A was the same as the number of students in Group B. The table below shows the distribution of preferred book types, in percent, for each group.
| Group A | Group B | |
|---|---|---|
| Fantasy | 40% | 50% |
| Science Fiction | 30% | 10% |
| Mystery | 20% | 20% |
| Biography | 10% | 20% |
| Total | 100% | 100% |
If a student who preferred Science Fiction is selected at random, what is the probability that the student is from Group A?
