Averages

problem

Spread

Age

16 to 18

Challenge level

3 out of 3

Given the mean and standard deviation of a set of marks, what is the greatest number of candidates who could have scored 100%?
problem

PDF

Age

16 to 18

Challenge level

3 out of 3

Given a probability density function find the mean, median and mode of the distribution.
article
May the Best Person Win

How can people be divided into groups fairly for events in the Paralympics, for school sports days, or for subject sets?