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25x1 + 24x3 + 23x2 + 22x5 + 21x4 + 20x2+19x1 = 396
banyak data = 1 + 3 + 2 + 5 + 4 + 2 + 1 = 13
Rata rata = jumlah semua data : banyak data
396 : 13 = 22 (C)