Math, asked by gopikaanandan143, 7 hours ago

Arithmetic mean for set one of observation is 20, and Arithmetic mean of whole 30 observations is 30 and the arithmetic mean of second 20 observations is ?

Answers

Answered by tejithreddyduvuru

0

Answer:

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Answered by shreeyahule

0

Answer:

The mean of set of 20 observations is 8.

Sum of the observations = 20×8=160

The mean of another set of 30 observations is 10

Sum of the observations = 30×10=300

Total number of observation = 20 + 30 = 50

Total sum of observations = 460

Combined mean =46050=9.2

Step-by-step explanation:

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