the mean of 5 numbers is 30 if each number is multiplied by 2 what is the new mean.
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Answer:
If one number is excluded then their mean becomes 28. Now we are given that if one number is excluded then their mean becomes 28. ... Hence we will exclude one term and form a new equation again by using mean = sum of datanumber of termssum of datanumber of terms
Answered by
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Answer:
Given that the mean of 15 numbers is 27
i.e n=15
mean =27
we know
Mean =
No. of numbers(observations)
sum of numbers
27=
15
sum of numbers
Sum of numbers =15×27=405
and if each number multiplied by 4.
After multiplication of each number their new sum of numbers will be
=405×4
=1620
∴ new mean =
no. of numbers(observations)
new sum of numbers
=
15
1620
=108
∴ new mean =108
this is wrong answer
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