Question: V 2 =3 ~ 4 5 6 7 8 9 10 Ivan has scored 77, 93, 58, and 79 on his previous four tests. What

V 2 =3 ~ 4 5 6 7 8 9 10 Ivan has scored 77, 93, 58, and 79 on his previous four tests. What score does he need on his next test so that his average (mean) is 78? X

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