Question

One dozen notebooks cost rupees 186. Find the cost of 7 such notebooks

Answer 1

given .
Cost of 12 note books = 186 Rs.

By using Unitary Method.

So Cost of 1 note book=186/12=13 Rs

Hence,Cost of 7 Such notebooks=13×7=91.Rs.

Hope it helps..
Regards,
Leukonov.

Answer 2

Answer:

The cost of 7 notebook is Rs 72.334

Step-by-step explanation:

According to the details provided in the above question,

The given data is cost of one dozen notebooks is Rs. 186

One dozen is equal to 12,

We have to find the cost of 7 notebook.

Here to get the cost of 1 note book we have to divide the cost of 12 notebook by 12,

Given, 12 notebook = Rs. 186

Cost of 1 note book is,

$=\frac{186}{12}\\=\frac{93}{6}\\=\frac{31}{3}\\=Rs10.334$

So, the cost of 12 book is,

$=7\times 10.334\\=Rs.72.334$

The cost of 7 notebook is Rs.72.334