Question

If the arithmetic mean of 5, 7, 9 x is 9 then the
value of x is​

Answer 1

Answer:

ANSWER

Given, arithmetic mean =9

A.M. = NumberSum

A.M. = 45+7+9+x

⇒9=421+x

⇒x=36−21

⇒x=15

Answer 2

Answer:

x=15.

Step-by-step explanation:

arthemetic mean= sum of all observations/number of all observations.

=5+7+9+x/3=9

=21+x=9×4

x=21-36

x=15