The probability questions are pretty much the same, and i have trouble with these ones(adsbygoogle = window.adsbygoogle || []).push({});

Question 1

The marks in a maths exam are normally distributed with a mean of 52 and a s.d. of 14. The number of marks alotted to each candidate is integral. If 30.85% of the candidates fail, what is the pass mark?

Question 2

In a certain exam, the class average was 55% and the s.d. was 19. If the teacher wanted to award the top 1% a grading of A, find the percentage the students had to score to be given an A.

Any help would be greatly appreciated, thanks

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# Homework Help: Help with 2 Probability Problems, should be simple for most

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