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 note books
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 Aditya. He
paid Rs.110 for 4 notebooks and 3 pens. Later, Deepak guess the cost of one
pen is Rs. 10 and Lohith guess he cost of one notebook is Rs.30.
i) 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 c) x + y = 80 and x + y = 110
b) 2x + 3y =80 and 3x + 4y =110 d) 3x + 2y =110 and 4x + 3y = 80
ii)Which is the solution satisfying both the equations formed in (i)
a) x =0,y=20 b) x =20,y =10 c) x =15,y =15 d) None
iii) Find the cost of one pen ?
a) Rs. 20 b) Rs. 10 c) Rs. 5 d) Rs. 15
iv) 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
v) Find whose estimation is correct in the given statement.
a) Deepak b) Lohith c) Ram d) Ajay

vi) Find the total cost if they will purchase the same type of 12
notebooks and 15 pens.
a) Rs. 400 b) Rs. 390 c) Rs. 450 d) Rs. 420

Answer 1

Answer:

a is correct answer all in question

Answer 2

Answer:

Step-by-step explanation: ans 1) = given, 3x + 2y = 80 and 4x + 3y = 110

ans2) = (b) x = 20, y = 10 as, 3x +2y = 80 , 3(20) + 2(10) = 60 + 20 = 80

ans 3) = (b) x = 20, y = 10 - acc. to ans2

ans4) (d) Rs. 420 ->  15(30)+12(20) = 420