SOLUTION: The grades of secondary school students on CXC's mathematics examination is normally distributed with a mean of 65% and a standard deviation of 13%. What is the probability that a

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Question 1195295: The grades of secondary school students on CXC's mathematics examination is normally distributed with a mean of 65% and a standard deviation of 13%. What is the probability that a randomly selected student obtained a score that is less than 65% on the mathematics examination?


Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The mean of a normally distributed function has half the values below it. The answer is one-half or 50%.