Asked by Tina
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
3,772
2,227
5,000
3,334
4,772
Answers
Answered by
Steve
20 is 2 std's out
2 std's is 47.7%
So, I'd pick 4772
2 std's is 47.7%
So, I'd pick 4772
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