Question 957200
(2144+2355+1869+X)/4=2100
(6368+X)/4=2100
4*2100=6368+X
8200=6368+X
X=8200-6368
X=1832 ANS.
PROOF:
(2144+2355+1869+1832)/4=2100
8200/4=2100
2100=2100