Total age of 18 girls = 18 × 36 = 648 years If the age of two more girls is added the average decreases by half a year, ∴ Total age of 20 girls = 35.5 × 20 = 710 Now, sum of the age of new girls = 710 – 648 = 62 years
I. 195x² - 46x - 21 = 0
II. 209y² + 7y - 12 = 0
I. 4x2 + 9x - 9 = 0
II. 4y2 - 19y + 12 = 0
I. 6x2 – 7x - 20 = 0
II. 3y2 - y - 14 = 0
I). p2 + 17p - 234 = 0
II). q2 - 21q + 108 = 0
I. 15y2+ 4y – 4 = 0
II. 15x2+ x – 6 = 0
Quantity I: The cash price of a notebook is Rs. 100 but is can also be purchased on 11 monthly equal instalments of Rs. 10 each. Find rate of S.I.?
...Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 24x + 135 = 0
Equation 2: y² - 26y + 153 = 0
I. 4x² - 21x + 20 = 0
II. 8y² - 22y + 15 = 0
I. 18p²- 21p + 6 = 0
II. 16q² - 24q +9 = 0
(i) 2x² – 9x + 10 = 0
(ii) 4y² – 12y + 9 = 0
