Question

25, 30 ,15 ,22, 20 ,12 ,26,20 30 and x. Find x.

17

18

19

20​

Answer 1

Answer:

Answer is 20

Step-by-step explanation:

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Answer 2

Answer:

Answer :

We know Mean = Sum of all observationsNumber of observations

So,

25 + 30 + 15 + 22 + 20 + 12 + 26 + 20 + 25 + x10 = 21⇒195 + x10 = 21⇒195 + x = 210⇒x = 15