Answer:
The grade of a Math Quiz is normally distributed with its mean, 81 and standard deviation, 8.4. If a student is randomly selected in class, what is the probability that his or her score will be higher than 90? 2. The historical data of a company's annual sales is normally distributed with its mean, $330 million and its standard deviation, $45 million. Find the probability that the company's sales will be between $300 million and $ 400 next year
Step-by-step explanation:
