Question

The cost of 36 pencils and 27 notebooks is Rs. 1233.
What is cost of 4 pencils and 3 notebooks?
a) 1230 b) 137
d) 313
c) 411​

Answer 1

B) 137 is the answer for this question

Answer 2

Option(b) 137 is the correct answer.

Given,

The cost of 36 pencils and 27 notebooks = Rs. 1233

To Find,

The cost of 4 pencils and 3 notebooks =?
Solution,

Let the cost of 1 pencil be x and 1 notebook be y

According to the question,

The cost of 36 pencils and 27 notebooks = Rs. 1233

36*x + 27*y = 1233

36x + 27y = 1233

Dividing equation by 9,

36x / 9 + 27y / 9 = 1233 / 9

4x + 3y = 137 ⇒ Equation 1

The cost of 4 pencils and 3 notebooks = 4*x + 3*y

The cost of 4 pencils and 3 notebooks = 4x + 3y

From equation 1, we get

The cost of 4 pencils and 3 notebooks = 4x + 3y = 137

The cost of 4 pencils and 3 notebooks = Rs. 137

Hence, the cost of 4 pencils and 3 notebooks is Rs. 137.