Given the set: {2, 1, -3, x, 1,

Litzy Wallace

Litzy Wallace

Answered question

2022-03-26

Given the set: {2, 1, -3, x, 1, 2, -4}, for what x would the mean of the set be 3?

Answer & Explanation

Ashley Olson

Ashley Olson

Beginner2022-03-27Added 12 answers

a=1ni=1nai (the mean of a set of n data points)
3=17i=17ai
x43+1+1+2+27=3
Multiply both sides by 7
7×x43+1+1+2+27=7×3
x+31=21
Add +1 to both sides
x-1+1=21+1
x=22

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