tolong y no 3-4 kkk plis

rata rata penjualan telur=(80+60+100+75+65+70+75) : 7 hari
=525 : 7 hari
=75

X = X1 + X2 + X3 + X4 + X5 + X6 + X7
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Ntotal
X = 80 + 60 + 100 + 75 + 65 + 70 + 75
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7
X = 75 per hari