Question

Heidi must correctly answer at least 80% of the questions on an exam to advance to the next

level in her online course. Heidi has already correctly answered 26 questions and incorrectly
answered 4 questions. How many of the 15 questions remaining must Heidi correctly answer
to advance to the next level?
A. at least 10
B. at least 11
C. at least 12
D. at least 13

Answer 1

Given:
must correctly answer 80% of the questions
correctly answered questions = 26
incorrectly answered questions = 4
unanswered questions = 15

Total questions = 26 + 4 + 15 = 45

45 * 80% = 36 required correctly answered questions.

36 - 26 = 10

Out of 15 remaining questions, 10 questions must be correctly answered for Heidi to advance to the next level.