Question

3 notebook cost 21 rs . The cost of 7 notebook is​

Answer 1

Answer:

49 is correct answer maybe i dont know

Answer 2

Answer:

$\large\mathbf\pink{ANSWER}$

$\longrightarrow$ Cost of 3 notebooks=₹21

$\longrightarrow$Cost of 7 notebooks=21 × 7/3

=147/3

= ₹49.

So, the cost of 7 notebooks is ₹49.