Determine the mean monthly salary of 50 employees of a company from the following frequency distribution.
(begin{array}{cc} text{Monthly salary} & text{Frequency}\hline N200.00 & 10\ N325.00 & 5\N100.00 & 20\N120.00 & 2\ N60.00 & 10\ N80.00 & 3end{array})
(begin{array}{cc} text{Monthly salary} & text{Frequency}\hline N200.00 & 10\ N325.00 & 5\N100.00 & 20\N120.00 & 2\ N60.00 & 10\ N80.00 & 3end{array})

A.
N215.30 
B.
N134.10 
C.
N143.10 
D.
N80.00 
E.
N50.30
Correct Answer: Option B
Explanation
(bar{x}) = (frac{fx}{N})
= (frac{6705}{50})
= 1341
= N134.10