the mean of 20 number is 8 if 4 is added to each number find out the new mean give solution
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Step-by-step explanation:
mean of 20 nos is 8 so sum of all 20 nos is 16.
adding 4 to each means 160+20×4=160+80=240
Mean =sum of all nos/total nos
=240/20=12
Answered by
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Question:
The mean of 20 number is 8, if 4 is added to each number, find out the new mean give solution.
Answer:
The new mean is 12.
Given:
The mean of 20 numbers is 8.
To find:
The new mean when 4 is added with each number.
Explanation:
The mean of 20 numbers is 8.
∴ The sum of the numbers = (8×20)
= 160.
When 4 is added with each number then the sum gets increased by_
(4×20)
= 80.
∴ The new sum of the numbers_
(160+80)
= 240.
∴ The new mean of the numbers_
(240÷20)
= 12.
∴ The new mean is 12.
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