Find mean salary, given frequency distribution

[SaeLk]

Can someone help me on this problem.

I am confused whether the answer is A or C cause my friend got A and i somehow got C. So after comparing my answer with his. i am doubting myself on this problem.

 

[stapel]

Re: Hi. I need help on this problem

my friend got A and i somehow got C. So after comparing my answer with his. i am doubting myself on this problem.

So you've already completed a solution. Great! Now show us your method (and perhaps also your friend's), so the tutors can see what you're doing and thinking, and can help you find any errors.

Please be specific. Thank you!

Eliz.

 

[SaeLk]

and as for my friend. i dunno what formula he used. he said something about dividing by 80 tho >.>

 

[Deleted member 4993]

You are not using the data regarding the # of employees.

Multiply each # of column C - with corresponding # of employees.

Add all those.

Divide by the total # of employees.