Question on: JAMB Mathematics - 2010
\(\begin{array}{c|c} Marks & 1 & 2 & 3 & 4 & 5\ \hline Frequency & 2 & 2 & 8 & 4 & 4\end{array}\)
The table above shows the marks obtained in a given test. Find the mean mark.
The table above shows the marks obtained in a given test. Find the mean mark.
A
3.1
B
3.0
C
3.3
D
3.2
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Correct Option: C
\(\begin{array} & Marks(x) & freq.(f) & fx \1 & 2 & 2 \ 2 & 2 & 4 \ 3 & 8 & 24 \ 4 & 4 & 16\ 5 & 4 & 20 \ \hline & \sum f = 20 & \sum fx = 66\end{array}\)
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Mean mark ,\(\bar{x}\) = \(\frac{\sum fx}{\sum f}\)
= \(\frac{66}{20}\)
\(\bar{x}\) = 3.3
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Mean mark ,\(\bar{x}\) = \(\frac{\sum fx}{\sum f}\)
= \(\frac{66}{20}\)
\(\bar{x}\) = 3.3
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