Question

Sonia bought 6 notebook of rupees 15 each and 5 more notebooks of rupees 20 each. Find the average cost of a notebook

Answer 1

Answer:

17.2

Step-by-step explanation:

6×15=90

5×20=100

190/11=17.2

Answer 2

Step-by-step explanation:

sonia bought 6 notebooks = RS 15 each notebook

and soina bought 5 more notebooks = RS 20 each notebook.

Total no.of notebooks =11

Price of 6 notebooks =6×15=90.

price of 5 notebooks =5×20=100

Total price of all notebooks=90+100=190

Average cost of notebook =190÷11=17.27

so,the average cost of notebook=17.27.