Question

23. If the average of 1,4,9, x, 25, 36 and 49, is 20, then x= ?
b) 25
c) 16
d) 9
a) 40

8 class CBSE question ​

Answer 1

1+4+9+x+25+36+49/7=20

124+x/7=20

124+x=140

x=140-124=16

Answer 2

Answer:

16

Step-by-step explanation:

1+4+9+x+25+36+49/7=20

or,124+x/7=20

124+x=20*7

124+x=140

X=140-124

X=16