Consider a set of 3n numbers having vari...

Consider a set of 3n numbers having variance 4. In this set, the mean of first 2n numbers is 6 and the mean of the remaining n numbers is 3. A new set is constructed by adding 1 into each of first 2n numbers, and subtracting 1 from each of the remaining n numbers. If the variance of the new set is k, then 9k is equal to ___________.

AI Generated Solution

Similar Questions

Explore conceptually related problems

Let n be an odd natural number such that the variance of 1,2,3,4,...., n is 14. Then n is equal to ___________.

The variance of first n natural number is:

If the variance of the first n natural numbers is 10 and the variance of the first m even natural numbers is 16 then m+n is equal

The mean of 20 numbers is 18. if 3 is added to each of the first ten numbers, find the mean of the new set of 20 numbers.

If the variance of the first n natural numbers is 10 and the variance of the first m even natural numbers is 16, then m+n is equal to ______ .

The variance of first n natural number is 10 and the variance of the first m even natural numbers is 16 then m+n is equal to.

If the variance of first n natural numbers is 2 and the variance of first m odd natural numbers is 40, then m +n =