select the letter of the correct answer in the Choices. Questions: 1. What is the mean? Choices: A. 65 B. 75 C. 85 D. 95 2. What is the standard deviation? Choices: A. 10 B. 5 C. 15 D. 20 3. What is the area of the shaded region? Choices: A. 0.9972 B. 0.9525 C. 0.9544 D. 0.0228

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