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Questions › JNU › JNU SSS 2015 › Q56
2 marks, −0.5Statistics › Random variables and standard distributions › The normal distributionModerateabout 2 min

JNU SSS 2015 Question 56: Random variables and standard distributions

The arithmetic mean of passengers on a metro car is 60. If the number of passengers on a car has a normal distribution with a standard deviation of 20, approximately what percent of metro cars carry more than 80 passengers?

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Random variables and standard distributions has come up 173 times in 7 exams since 2005.

What this question tests

This question is on The normal distribution, part of Random variables and standard distributions in Statistics.

The bell curve: standardising, tail probabilities and approximations.

TestStop has 20 past-paper questions on this subtopic; the nearest in year are below.

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Practise Random variables and standard distributionsMore on The normal distribution

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Question from the JNU SSS 2015 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.