Step-by-step explanation:
let the three arithmetic means is x,yand z
-4,x,y,z,16
we know that common difference is same in A.P
x+4=y-x
2x=y-4 ---------------------(1)
y-x=z-y
2y=z+x ---------------------(2)
z-y=16-z
2z=16+y --------------------(3)
after solving equation (1),(2)and(3) we get
x=1
y=6
z=11
