Find the new arithmetic mean — task. Mathematics State Board, Class 9.

UPSKILL MATH PLUS

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Answer variants:

680

13.125

681

10.125

679

11.125

1. The arithmetic mean of 8 observations is 85. If each observation is multiplied by 8, then the new arithmetic mean for the new set of values is

2. The arithmetic mean of 7 observation is 89. If each observation is divided by 8, then the new arithmetic mean for the new set of values is

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12. Find the new arithmetic mean