The friends table has the columns and contents as shown: Mysql> SELECT * FROM friends; This statement was executed: SELECT AVG (age) FROM friends What value is returned?

The correct answer is C. 20. See the full explanation below for the reasoning.

Question

The friends table has the columns and contents as shown:

Mysql> SELECT * FROM friends; This statement was executed:

SELECT AVG (age) FROM friends What value is returned?

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