In the following question two equations numbered I and II are given. You have to solve both the equations and ____
I.$$ {15\over \sqrt {x}}-{2\over \sqrt {x}}=6\sqrt {x}$$
II.$$ {\sqrt {y}\over 4}-{7\sqrt {y}\over \sqrt {12}}={1\over \sqrt {y}}$$
Give answer
(A) x>y
(B) x≥y
(C) x<y
(D) x≤y
(E) x=y or the relationship cannot be established

What approximate values should come in place of the question mark(?) in the following question?

What are the roots of the quadratic equations?

  $$(x^2 + 3x - 154 = 0)$$

The average of five numbers is 49. The average of the first and the second numbers is 48 and the average of fourth and fifth numbers is 28. What is the third number?