or
or
ধরি, সংখ্যা তিনটি a, b ও c
(a + b + c)/3 = x
= > a + b + c = 3x
আবার, (a + b)/2 = y
a + b = 2y এবং
(b + c)/2 = z
= > b + c = 2z
এখন, a + b + b + c = 2y + 2z
= > a + b + c + b = 2y + 2z
= > b = 2y + 2z - (a + b + c)
b = 2y + 2z - 3x
