Question

lf the mean of five observations y y+2,y+4,y+6 and y+8 is 11, then find the value of y.

Answer 1

y+y+2+y+4+y+6+y+8/5=11
5y+20/5=11
y+4=11
y=7

Answer 2

y+y+2+y+4+y+6+y+8/5 =11

5y+20 =55
5y=35
y=7