1.

The price of 6 notebook and 3 pen is 69₹ .The price of 6 notebook and 2 pen is 186 ₹.What is the price of a notebook?what is the price of a pen ?​

Answer»

Let SAY price of one NOTEBOOK is X, and price of one pen is Y.

2X+3Y =69

6X+2Y =186

By multiplying 2 in equation 1 and multiplying 3 in equation 2

4X+6Y=138

18Y+6Y=558

So by elimination method X is equal to 30.

Now if we put the VALUE of X in equation 1

2*30+3Y=69

6X+2Y =186

By multiplying 2 in equatio

3 in equation 2

4X+6Y-138

18Y+6Y=558

85%

So by elimination method X is equal to 30.

So by elimination method X is equal to 30.Now if we put the value of X in equation 1

2*30+3Y=69

60+3Y=69

3Y=69-60

3Y=9

Y=3

Hence, The cost of a notebook is 30 RUPEES and the cost of a pen is 3 rupees.


Discussion

No Comment Found

Related InterviewSolutions