Question

Aryan bought some erasers @ rupees 30 per dozen and sold them at a profit of 30% find the selling price of an eraser​

Answer 1

Answer:

Eraser:

CP = Rs 30 per doz.

Sp=30x130/100 = Rs 39 per doz.

Answer 2

Step-by-step explanation:

cost of 12 eraser=Rs 30

cost of 1eraser=30/12

=Rs 2.5

we know that,

SP=100+profit%. ×CP

100

= 100+30. ×2.5

100

=130. ×2.5

100

=1.3×2.5

=Rs3.25

therefore,SP of 12 eraser is Rs 3.25