Question

Deepak bought 3 notebooks and 2 pens for Rs. 80. His friend Ram said that price of each notebook
could be Rs. 25. Then three notebooks would cost Rs.75, the two pens would cost Rs.5 and each pen
could be for Rs. 2.50. Another friend Ajay felt that Rs. 2.50 for one pen was too little. It should be at
least Rs. 16. Then the price of each notebook would also be Rs.16.
Lohith also bought the same types of notebooks and pens as Deepak. He paid Rs. 110 for 4 notebooks
and 3 pens. Later, Deepak guess the cost of one pen is Rs. 10 and Lohith guess the cost of one notebook
is Rs. 30.
1. Form the pair of linear equations in two variables from this situation by taking cost of one notebook as Rs. x
and cost of one pen as Rs. y.
(a) 3x + 2y = 80 and 4x + 3y = 110 (b) 2x + 3y = 80 and 3x + 4y = 110
(c) x + y = 80 and x + y = 110 (d) 3x + 2y = 110 and 4x + 3y = 80
2. Which is the solution satisfying both the equations formed in (i)?
(a) x = 10, y = 20 (b) x = 20, y = 10 (c) x = 15, y = 15 (d) none of these
3. Find the cost of one pen?
(a) Rs. 20 (b) Rs. 10 (c) Rs. 5 (d) Rs. 15
4. Find the total cost if they will purchase the same type of 15 notebooks and 12 pens.
(a) Rs. 400 (b) Rs. 350 (c) Rs. 450 (d) Rs. 420
5. Find whose estimation is correct in the given statement.
(a) Deepak (b) Lohith (c) Ram (d) Ajay

Answer 1

Step-by-step explanation:

I hope it's helpful for you

Answer 2

Answer:

1. (a) 3x + 2y = 80 and 4x + 3y = 110

2. (b) x = 20, y = 10

3. (b) Rs. 10

4. (d) Rs. 420

5. (a) Deepak