Respuesta :

BeaVechiato
current average = (80 + 93 + 63 + 83 + 83) / 5
= 402 / 5
= 80.4

79 x 6
= 474

what he needs to score on the next test = 474 - 402
= 72

{reassurance = (80 + 93 + 63 + 83 + 83 + 72) / 6
= 474 / 6
= 79}

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