Odpowiedź:
nowa średnia = (10s + 10 * 2)/10 = (10s + 20)/10 = 10(s + 2)/10 = s + 2
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Odpowiedź:
nowa średnia = (10s + 10 * 2)/10 = (10s + 20)/10 = 10(s + 2)/10 = s + 2