I’m pretty sure you would have a 72% which would be a low C but maybe still passing. My schools passing grade is 70%. You would have to see what a passing grade is in your school.
It’s unsolvable with out more context. What’s the rest of the problem.
Answer:
a. 12 yd
Step-by-step explanation:

300*.4=120
300-120=180
there are 120 yellow balls and 180 white balls.
120*.2=24
180*.8=144
sallys team found 168 balls
The aswer would be B because you have to divide a couple numbers to get 20in.