On Miss Lawrence's math exam, 80% of the 50 questions are problem-solving while the rest are multiple-choice questions. How many multiple-choice questions are there?
Let's think step by step below.
10
100% - 80% = 20% of Miss Lawrence's exam are multiple - choice questions.

Thus, there are 50 x 20 / 100 = 10 multiple - choice questions.

.

Final answer: 10