The marks of 2376 students in an IB exam are normally distributed with mean 49 marks and variance 225
A) if the mark is 45 estimate the number of candidates who passed the exam?
B) if top 7% of students are awarded a 7, find the minimum mark required to obtain a 7?
mean=49
variance=225
standard deviation=15
n=2376
I don't know how to do this question?
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somethung
Anyone find out how to do this?
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