The average age of five emplyees at a local bank is 38 years. The age of four of the five employees is 19, 28, 62, and 51 years. What is the age of the fifth person?

Question

anonymous · Answer

My understanding is that the average of something should be the sum of all numbers and than divide for the "number of numbers". But here one is missing, and I cannot figure out how to get there. Dummy me.

anonymous · Answer

where did you get 179?

uri · Answer

@phi help him please.

anonymous · Answer

the final response can only be 30 or 38.

nnesha · Answer

the answer is 30 
so when you add all five numbers and divide by 5 you get 38 which is you average :)

anonymous · Answer

How would you have got there, if you didn't know that one of the possible response were 30? :) Thanks, though!

nnesha · Answer

because there is five numbers 
i did the backward 
i multiply 38 by 5 ( 38 average and five numbers) i get 190 
and the gave me 4 numbers and there sum is 160 so i subtract 190 with 160 and i get 30
so  then i add 4 numbers with 30 and divide by  5 i get 38 so i know 30 is a answer :) :}

anonymous · Answer

Brilliant! Thank you!

nnesha · Answer

my pleasure :) :}