Math
posted by Ignatz .
A person exercises for a total of 25 minutes.
Of the 25, 20 minutes is at Level 2.
Of the 25, 5 minutes is at Level 3
What is the average level for the 25 minutes?
Provision of a formula for future problems like this will be appriciated.

Math 
PsyDAG
(20*2 + 5*3)/25 = ?
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