Question

H If the rate of notebooks is Rs. 240 per dozen, what is the cost of 3 notebooks?
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Answer 1

Answer:

here cost of 12 books =240

cost of one book =240 /12

Step-by-step explanation:

cost of one book =20

cost of 3 books =3×20

cost of 3 books =60

hope it helps you

Answer 2

Answer:

1 dozen= 12 notebooks

cost of 12 notebooks= Rs. 240

METHOD 1-

3 notebooks= 12 notebooks divided by 4

cost of 3 notebooks= Rs. 240/4

                                  =Rs. 60

METHOD 2-

Cost per notebook= Rs.240/12

                               = Rs. 20

Cost of 3 notebooks= cost of 1 notebook x3

                                  = Rs.20*3

                                  =Rs. 60