Question

if a,b,c,d and we are 5 consecutive numbers then what is their mean

Answer 1

let first even number a = 2n
then next are --
b =2n+2
c =2n+4
d =2n+6
e =2n+8

mean = sum of all numbers /total no
=(2n + 2n +2+2n +4+2n+6+2n+8)/5
=(10n+20 )/5 = 2n +4
but c=2n+4

hence , answer is c