Multiple choice

Rita's grades in four tests are 82, 80, 76 and 70. What grade must she get on the fifth test to raise her average to 80?

  1. 86

  2. 88

  3. 92

  4. 96
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To achieve an average of 80 across 5 tests, Rita needs total points of 5 x 80 = 400. Her current total is 82 + 80 + 76 + 70 = 308. She needs 400 - 308 = 92 on the fifth test. This demonstrates the average formula: sum of values divided by count.

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