exam Maths Puzzle Numerical Ability

Find the mean.

-9,-7,3,5,6,20

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exam Other Question

The report stated that two out of every five young people were unable to find a job. What fraction of the young people were able to find a job? I would greatly appreciate any help solving this problem.

Suppose instead that the town experiences quadratic growth of the form P=8t^2+Po
where t is the time in years from 2