Posted by **Tina** on Wednesday, November 28, 2012 at 11:46am.

10,000 students took a math test. If there average score was 40 with standard deviation of 10, how many students must have scored between 20 and 40 marks?

3,772

2,227

5,000

3,334

4,772

## Answer this Question

## Related Questions

- statistics - It is known that the population mean for the Quantitative section ...
- stats - 2. A standardized exam was provided to all 3rd graders in Arizona ...
- CRJ303-Statistics question - Re-worded from the "Study Questions" part of ...
- statistic - The average score on a standardized test is 750 points with a ...
- statistics - The average score on a standardized test is 500 points with a ...
- Statistics - Students were given an exam with 300 multiple-choice questions. The...
- statistics - At a local high school students were randomly assigned to one of ...
- Precalculus - Suppose that the mean score of 250,000 students on the mathematics...
- Precalculus - Suppose that the mean score of 250,000 students on the mathematics...
- math - stat theory says approximately 68% of measurements lie between +- one ...