Question

what is the mean of 1,2,3,4,5

Answer 1

Mean of 1,2,3,4,5=(1+2+3+4+5)/5
                            =15/5=3
therefore,mean of 1,2,3,4,5=3.......

Answer 2

mean = sum of all the given terms/no. of terms given
mean = (1+2+3+4+5)/5
mean = 15/5
mean = 3