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The SAT scores of students who took the SAT test in 2010 were normally distributed with...

The SAT scores of students who took the SAT test in 2010 were normally distributed with a mean of 1509 and a standard deviation of 312.

What proportion of student scored below 1805 on this SAT?

What score is need on this test to be in the top 10% of all test takers?

math   Statistics-And-Probability   
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