Question

Write a letter to your grandfather celebrates his 90 th birthday next week write a letter to him expressing love and joy with him ​

Answer 1

Answer:

5 is added to 100 observations each.  

So =500=(5×100) is added.  

Then divided by 100. ie 5.  

So mean increases by 5 to become 55.

S.D will remain same because every observation increased by 5 and mean also increased by 5.  

( standard deviation is the squareroot of the difference of mean and each observation divided by the number of observations )

(55,10)

Explanation:

Answer 2

Explanation:

5 × 500 = yx + xy = yx and xy