For a recent quiz about averages, the following information is known:
There were three questions on the quiz.
Each question was worth \(5\) marks.
Each question was marked right or wrong (no part marks).
\(30\%\) of the students got all \(3\) questions correct.
\(40\%\) of the students got exactly \(2\) questions correct.
\(25\%\) of the students got exactly \(1\) question correct.
\(5\%\) of the students got no question correct.
Determine the overall class average for this quiz.
Theme: Number Sense