A student has scores of 82, 88, and 90 on three math tests. What is the minimum score the student must get on the fourth test to have an average of at least 87?

✓ Correct Answer: Option D

Let x be the score on the fourth test. The sum of scores divided by 4 must be at least 87: (82 + 88 + 90 + x) / 4 ≥ 87. This simplifies to (260 + x) / 4 ≥ 87. Multiply by 4: 260 + x ≥ 348. Subtract 260: x ≥ 88. The minimum score is 88.