Question

Average of 20, 30, 40 and X is 25. What is the value of X = ?
Please answer asap!!!​

Answer 1

Answer:

Average = Sum of observations / No. of observations

      25 = 20+ 30+40 + x/4

      25= 90+ x /4

       25* 4= 90 + x      (Shifting 4 to other side)

       100= 90+ x

        x =100 -90

        x= 10

Hope it helps!!