Calculating the mean (with 5 random sample and the top 5 numbers) from 90 population

[vantheman]

Hi all,

first time user and im hoping somewould could assist. I have a tricky question (for me anyway) and need to calculate the Mean/average.

OK here is the example

There are 90 people all earning various salaries.

The only info i have is 5 salaries chosen at random, but im also given the top 5 salaries.

I need to work out the mean of the 90 people, by only using the 5 random salaries and 5 of the top salaries provided.

Is this possible and can someone show me an easy way to calculate?

Thanks in advance

 

[srmichael]

Is this all the problem states? Seems like there is something missing? How can one calculate the mean of 90 salaries given just 10 of the salaries?