Question
The average age of a class of 23 girls is 15 years. If 2
new girls having average age of 10 years join the class, then the average age of the class becomes:Solution
Total age of 23 girls = 23 × 15 = 345 years Total age of 25 girls = 345 + (2 × 10) = 365 years Therefore new average age = 365/25 = 14.6 years
I. x2Â - 9x - 52 = 0
II. y2Â - 16y + 63 = 0
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between 'p' and 'q' and choose...
Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 42x + 392 = 0
Equation 2: y² - 46y + 480 = 0
I. 63x2 + 148x + 77 = 0
II. 21y2 + 89y + 88 = 0
(i) 2x² – 9x + 10 = 0
(ii) 4y² – 12y + 9 = 0
I. 2x² - 9x + 10 = 0
II. 3y² + 11y + 6 = 0
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between 'p' and 'q' and choose...
I. 22x² - 97x + 105 = 0
II. 35y² - 61y + 24 = 0
I. 2x2 + 13x + 21 = 0
II. 3y2 + 34y + 63 = 0
Equation 1: x² + 16x + 63 = 0
Equation 2: y² + 10y + 21 = 0
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