the mean of five numbers is 8. four numbers are 7,11,12 & 4. what is the fifth number?
8 X 5=40 the sum of 5 terms
40 - (7+11+12+4)=6 which is your 5th number.
That is an excellent answer guest.
I would have solved this little equation.
\(\frac{7+11+12+14+x}{5}=8\)
+53 
