Question

answer me it is argent please solve it in the process I will make you brainlist​

Answer 1

Question:

Find the cost price of 30 notebooks at the rate of ₹20 per dozen

(a) ₹60 (b) ₹45 (c) ₹35 (d) ₹ 50

Answer:

d) ₹ 50

Step-by-step explanation:

Given that cost price of 1 dozen notebooks is ₹ 20.

We know that,

• 1 dozen = 12

Therefore, the cost of 12 notebooks is ₹20.

Now,

Cost of 12 notebooks = ₹ 20

Cost of 1 notebook = 20/12

As per given question we have to find out the cost of 30 notebooks.

So,

Cost of 30 notebooks = 20/12 × 30

= 600/12

= 100/2

= 50

Therefore, the cost of 30 notebooks is ₹ 50.

Answer 2

Step-by-step explanation:

Cost of 12 notebooks = ₹ 20

Cost of 1 notebook = ₹(20/12)

Cost of 30 notebooks =?

Cost of 30 notebooks = 20/12 × 30

= 600/12

= 100/2

= 50

Therefore, the cost of 30 notebooks is ₹50.