Answer:
21 free throws is true.
Explanation:
It is given that:
Let the completed free throws be denoted by : C
and attempted free throws be denoted by A.
The ratio of a basketball player's completed free throws to attempted free throws is 4 to 7.
i.e.

If she completed 12 free throws, we have to find how many free throws did she attempted.
Now we are given C=12.

Hence, total number of free throws attempted= 21