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The $A . M$ of a data is 10. Each observation of the data is multiplied by 2 and 3 is added to the products. $A . M$ of a data is 10. Each observation of the data is multiplied by 2 and 3 is added to the products. of the results obtained is

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answer is A.

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Detailed Solution

Given

$= a − 3 d + a − d + a + d + a + 3 d 4$

$= 4 a − 4 d + 4 d 4 = a$

Each observation charged as

$A . M$

Mean

$A . M$

$x 1 + x 2 + x 3 + ⋯ + x n n = 10$

$x 1 + x 2 + x 3 + ⋯ + x n = 10 n$

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