Question

Average of 20,30,40 and X is 25 .What is the value of X =​

Answer 1

Answer:

10

Step-by-step explanation:

20 + 30 + 40 + X / 4 = 25

=> 90 + X / 4 = 25

=> 90 + X = 100

x = 100 - 90 = 10

Answer 2

(20 + 30 + 40 + x)/4= 25

$\implies \frac{90+x}{4}×25$

90 + x = 100

x = 100 - 90 = 10