Mathematics

27 December, 08:51

Ripley's spelling grades are 86, 84, 90, and 90. If he scores 0 on the next spelling quiz, what will happen to the MEAN of his scores? A) It will decrease by 8.5. B) It will increase by 13.5. C) It will increased by 17.5. D) It will decreased by 17.5.

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