Question

If the mean of 3 , 7 , 11 and x is 9 . What is the value of x ?

Answer 1

Answer:

the value of x- (-24)

Step-by-step explanation:

3-7-11-x=?

3-7-11=(-15)

(-15)+x=9

which is (-24)

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Answer 2

Answer:

15

Explanation

Mean aka average = sum of all numbers/ number of given values

9 = ( 3 + 7 + 11 + x )/4

9 = (21 + x)/4

9 × 4 = 21 + x

36 = 21 + x

36 - 21 = x

15 = x