What is the average of odd numbers greater than 10 but less than 30?
ATQ, Odd numbers greater than 10 but less than 30 = 11, 13, 15, 17, 19, 21, 23, 25, 27, 29 Required average = 
= 200/10 = 20
I. 3y2+ 16y + 16 = 0
II. 2x2+ 19x + 45 = 0
I. 2 x ² + x – 1 = 0
II. 2 y ² - 3 y + 1 = 0
...I. 4x2+ 3√7 x-7 =0
II. 7y2+ 4√7 y-5=0
I. 3p² - 17p + 22 = 0
II. 5q² - 21q + 22 = 0
Roots of the quadratic equation 2x2 + x – 528 = 0 is
I. 2x2 - 9 x + 9 = 0
II. 2y2 - 7 y + 3 = 0
I. 4x² - 21x + 20 = 0
II. 8y² - 22y + 15 = 0
I. x2 + 91 = 20x
II. 10y2 - 29y + 21 = 0
I. 27x² + 120x + 77 = 0
II. 56y² + 117y + 36 = 0
I. x2 – 13x + 40 = 0
II. 2y2 – 15y + 13 = 0
