Question

if mean of the data is (x2 + y2 - xy) and F, = (x + y). then the value of Efx is?​

Answer 1

Answer:

$Given: .$

Step-by-step explanation:

So, basically we should find the value of

(1) xy = 10. Directly gives us the value we needed. Sufficient.

(2) x = 5. Now even if we substitute the value of in we'll get two values for : 2 and -2, hence two values for : 9 and 49. Not sufficient.

Answer: A.

Hope it's clear.

Answer 2

Answer:

. Discuss minimum value of f(x,y)=x2 + y2 + 6x + 12. hence. f(x,y) has minimum value at (-3,0), which is f(x,y) = 12 + 9 – 18 = 3.