Answer:
10 problems
Step-by-step explanation:
This is the answer because:
1) We have to solve for what 20% of 50 is since she finished 20% of her test:
20% of 50 = 10
[tex]\frac{2}{10}[/tex] × [tex]\frac{50}{1}[/tex] = [tex]\frac{100}{10}[/tex] = 10
Therefore, the answer is 10 problems.
Hope this helps! :D