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Determine the mean monthly salary of 50 employees of a company from the following frequency...

Mathematics
JAMB 1982
Determine the mean monthly salary of 50 employees of a company from the following frequency distribution.
\(\begin{array}{c|c} \text{Monthly salary} & \text{Frequency}\\\hline N200.00 & 10\\ N325.00 & 5\\N100.00 & 20\\N120.00 & 2\\ N60.00 & 10\\ N80.00 & 3\end{array}\)
  • A. N215.30
  • B. N134.10
  • C. N143.10
  • D. N80.00
  • E. N50.30
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Correct Answer: Option B
Explanation
\(\bar{x}\) = \(\frac{fx}{N}\)

= \(\frac{6705}{50}\)

= 1341

= N134.10
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