Question 3 • Concepts in Probability and Statistics
There are 6 tests total: 2 + 3 + 1. Add the scores for all six tests: (2 × 85) + (3 × 92) + 94 = 540. Divide by 6 to find the mean: 540 ÷ 6 = 90 percent, so Nora’s average is 90 percent.
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