Given the set: {6,x,7,11,29,4,5}, for what x would the mean of the set be -9?

1 Answer
Dec 11, 2015

×x=95

Explanation:

ׯa=1nni=1ai (the mean of a set of n data points)

×9=177i=1ai
6+x+7+11+29457=9

Multiply both sides by 7
×76+x+7+11+29457=7(9)
x+32=63

Add 32 to both sides
×x+3232=6332
x=95