Question

A student needed to find arithmetic mean of numbers 3 11

Answer 1

Hello,
3+11/2
=) 14/2
=)7is the answer.. Hope it helps...
If you need the formula the it's herr
Mean=sum of the numbers/total no. Of numbers.

Pls mark it if helped.. Thnx

Answer 2

Answer:

Step-by-step explanation:

As, Mean = Total Sum of Observations / No. of Observations

Clearly, we have (3 + 11 + 7 + 9 + 15 + 13 + 8 + 19 + 17 + 21 + 14 + x) / 12 = 12.

or  137 + x = 144

⇒ x = 144 - 137 

       = 7.

Hope This Helps :)

Mark as brainliest please