The average of 6 observation is 12. A new 7th observation is included and the new average is decrease by 1 , the seventh observation is ?

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Mathematics

asked Sep 07, 2023 at 09:12

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Answer 1

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Seventh observation = sum of 7 observations - sum of 6 observations = 7 x 11 – 6 x 12 = 5

answered Sep 07, 2023 at 09:12

A

Answer 2

Seventh observation = sum of 7 observations - sum of 6 observations = 7 x 11 – 6 x 12 = 5

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