Question

the mean of series of 12 items is43. if 2 is added to each item of each series find the new mean​

Answer 1

Answer:

given that the mean of 12 items is 43

so, the resulting mean increased by 2 = 43 + 2 = 45

therefore the answer is 45 .

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Answer 2

Answer:

45

Step-by-step explanation:

Old mean of the average of 12 is 43

So, the sum will be

$12 \times 43 \\ (10 + 2) \times 43 \\ 430 + 86 \\ 516$

The sum of 12 number is 516

Given, that 2 is added to all the numbers

So the new sum will be

Old sum +( total number×2)

$516 + (12 \times 2) \\ 516 + 24 \\ 540$

new average

$540 \div 12 \\ 45$