Jawabanmu

2014-02-12T20:32:59+07:00
Jawaban paling cerdas!
2014-02-12T20:42:39+07:00
1,75 = sigma X / n
1,75 = sigma X / 4
sigma X = 1.75 x 4.............(1)

180 = sigma X + X / n + 1
180 = sigma X + X / 4+1
180 = Sigma X + X / 5
Sigma X + X = 180 x 5
Sigma X + X = 900
700 + X = 900
X = 900 - 700
X = 200
1 5 1