Question

If stickers are sold at the rate of 3 for ₹10, what will be the cost of 3 dozen stickers​

Answer 1

1 dozen=12

so 3 dozen=36

36÷3=12
we divided by 3because cost of3 stickers are known
12×10=120

so the cost of 3dozen stidkers are 120rs

Answer 2

rate of 3 stickers=18 rs

rate of 1sticker=10/3

1 dozen =12 stickers

3 dozen= 36 stickers.

rate of 36 stickers = rate of 1 sticker × total number of stickers

=10/3 ×36

=120 rs