sonia bought 6 notebooks of 15₹ each and more notebooks of ₹20 each. Find the average cost of a note book.
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Answer:
The average cost of a notebook is ₹15
Step-by-step explanation:
The cost of one notebook =₹15
The cost of six notebooks =15×6
= ₹90
Sonia bought 20 more notebooks
So , the cost of 20 notebooks =20×15
= ₹300
The total cost of notebooks bought by Sonia = ₹300+₹90 = ₹390
Average = Total sum of all number divided by the number of items
The average cost of all notebooks = 300+90 / 20+6
= 390/26 =15
.
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