Chapter 3 – Pair of Linear Equations in Two Variables

Yash scored 40 marks in a test, getting 3 marks for each right answer and losing 1 mark for each wrong answer. Had 4 marks been awarded 4 marks for each correct answer and 2 marks been deducted for each incorrect answer, then Yash would have scored 50 marks. How many questions were there in [...]

A fraction becomes 1/3 when 1 is subtracted from its numerator and it becomes 1/4 when 8 is added to its denominator. Find the fraction A fraction becomes 1/3 when 1 is subtracted from its numerator and it becomes 1/4 when 8 is added to its denominator. Find the fraction October 3, 2020 Category: Chapter [...]

A part of monthly hostel charges is fixed and the remaining depends on the number of days one has taken food in the mess.When a student A takes food for 20 days, she has to pay Rs.1000 as hostel charges whereas a student B, who takes food for 26 days, pays Rs.1180 as hostel charges.Find [...]

Solve the following pair of linear equations by the substitution and cross-multiplication methods : 8x + 5y = 9, 3x + 2y = 4 3x + 2y = 4 Solve the following pair of linear equations by the substitution and cross-multiplication methods : 8x + 5y = 9 October 3, 2020 Category: Chapter 3 - [...]

Which of the following pairs of linear equations has unique solution, no solution, or infinitely many solutions. In case there is a unique solution, find it by using cross multiplication method. 3x- 5y = 20, 6x – 10y = 40 6x - 10y = 40 find it by using cross multiplication method. 3x- 5y = [...]

Which of the following pairs of linear equations has unique solution, no solution, or infinitely many solutions. In case there is a unique solution, find it by using cross multiplication method. 2x +y = 5, 3x + 2y = 8 3x + 2y = 8 find it by using cross multiplication method. 2x +y = [...]

Which of the following pairs of linear equations has unique solution, no solution, or infinitely many solutions. In case there is a unique solution, find it by using cross multiplication method. find it by using cross multiplication method. no solution or infinitely many solutions. In case there is a unique solution Which of the following [...]

A lending library has a fixed charge for the first three days and additional charge for each day thereafter. Saritha paid Rs. 27 for a book kept for seven days, while Susy paid Rs. 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day. A [...]

Meena went to a bank to withdraw Rs 2000. She asked the cashier to give her Rs 50 and Rs 100 notes only. Meena got 25 notes in all. Find how many notes Rs 50 and Rs 100 she received. Meena went to a bank to withdraw Rs 2000. She asked the cashier to give [...]

Meena went to a bank to withdraw Rs 2000. She asked the cashier to give her Rs 50 and Rs 100 notes only. Meena got 25 notes in all. Find how many notes Rs 50 and Rs 100 she received. Meena went to a bank to withdraw Rs 2000. She asked the cashier to give [...]