Sannolikhet på engelskan

Hej jag har en frågan som jag behöver hjälp med: 

Per and Anna wants to take a course in machine learning but cannot decide if they should take the machine learning course at University 1 or University 2. They leave their choices to chance by writing "University 1" or "University 2" on 10 notes each whereof they randomly select one of the notes, each person from his or her own pile.

Per writes "University 1" at 6 out of his 10 notes and "University 2" on the rest. Anna, who favors the course at University 2, writes "University 1" on only 3 out of her 10 notes and "University 2" on the remaining 7.

Given that they both end up in the same course, what is the probability that they are taking the course at University 2? Give your answer as a decimal with two decimal places