Question

If x,y,z are positive rational numbers then the value of √x–¹ y, √y-¹z,√z–¹x is equal to
a) 1/xyz
b) x²y²z²
c) xyz
d)1​

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)

Step-by-step explanation:

Answer 2

Step-by-step explanation:

$\frac{xyz}{ \sqrt{x} \times \sqrt{y} \times \sqrt{z} } = \frac{xyz}{ \sqrt{xyz} } =$