Question
The average cost price of 18 pens (having equal cost
price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.74. Find the cost price of the pen that was replaced.Solution
Let the cost price of each pen be Rs.x So, cost price of 18 pens = Rs.18x According to the question, => (18x – x + 74)/18 = x – 2 => 17x + 74 = 18x – 36 => x = 110 Therefore, the cost price of the pen that was replaced is = Rs.110
I. x² + 3x – 154 = 0
II. y² + 5y – 126 = 0
I. 22x² - 97x + 105 = 0
II. 35y² - 61y + 24 = 0
What are the coordinates of the point which divides the line joining (-1, 7) and (4, 3) in the ratio 2:3?
Solve the quadratic equations and determine the relation between x and y:
Equation 1: 21x² - 122x + 160 = 0
Equation 2: 23y² - 159y + ...
I). p2 + 17p - 234 = 0
II). q2 - 21q + 108 = 0
I. 6x2 + 23x + 10 = 0
II. 2y2 - 3y - 5 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: 6x² - 24x + 18 = 0
Equation 2: 5y² - 20y + 15 = 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. x2 – 12x + 32 = 0
II. y2 + y - 20 = 0
I. x2 + 91 = 20x
II. 10y2 - 29y + 21 = 0
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