Hi !
10 rubber stamps → $ 10.33
If 10 rubber stamps cost $ 6.55 , then you should find out how much it costs a rubber stamp,by dividing by 10 :

rubber stamps → $

1 rubber stamp → $

So, you have to multiply 1 marker by 2 :
2 rubber stamps → 2*\frac{10.30}{10}
x - the cost of the 2 rubber stamps
⇒ x = 2*\frac{10.30}{10}
x =
2.06
A : x = 2*\frac{10}{10.30} =1.94
≠ 2.06B : x = 2*\frac{10}{10.30} =1.94
≠ 2.06C : x = 2*\frac{10}{10.30} =1.94
≠ 2.06D : x = 2*\frac{10}{10.30} =1.94
≠ 2.06So,the answer is :
E (none of the above)