Analyzing Student Exam Scores

Medium Data Sufficiency Analyzing Information

A college professor is analyzing the grades of her students on a recent exam. The exam scores of a group of students range from 0 to 100.

Statement (1): The average score of the students on the exam is 75.

Statement (2): At least 30% of the students scored above 80.

How many students scored above 70?

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

Both statements together are sufficient, but each statement alone is not sufficient.

Each statement alone is sufficient.

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% Correct53%