median
don steward
mathematics teaching 10 ~ 16

Friday 11 November 2016

mean changes

some of these tasks are based on a WJEC GCSE question

a powerpoint is here

the mean of 5 numbers is 6
another number is included and the mean is now 5
what was the additional number?

the mean of 5 numbers is 7
two other numbers are included and the mean is now 5
what is the sum of the two additional numbers that were included?
give some examples of what they could be










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