Answer:
Mary correctly answered <u>3</u> questions on her test.
Step-by-step explanation:
Given:
For one Algebra test, Mary had to answer 15 questions.
Mary answered 20% of them correctly.
Now, to find the questions Mary correctly answered on her test.
Total number of questions for algebra test Mary had to answer = 15.
Mary answered correctly = 20%.
Now, to get the number of questions Mary answered correctly:
Therefore, Mary correctly answered 3 questions on her test.