Answer:
21%
Step-by-step explanation:
the total number of students is 19.
the number of students that have an A is 7.
the number of students that have an A and are a boy is 3, which leaves 4 others in the category of getting an A.
4 out of the 19 total students could be female with an A.
4/19 = 0.21 = 21%