The average of 22, 24, 28, 31 and x is 25 . What will be the value of x ?

18 20 24 22

20

Average =  \(\frac{sum \;of\; all\; numbers }{number\; of\; terms }\) 25 =  \(\frac{22+\;24+\; 28+\;+ 31\;+\;x }{5}\) 125 = 105 + x  x = 20