In a box of pens, the ratio of black pens to red pens is 8 to 1 . There are

Question

In a box of pens, the ratio of black pens to red pens is 8 to 1 . There are 40 black pens in the box. How many red pens are in the box?

Accepted Answer

Choice A is correct. It&rsquo;s given that the ratio of black pens to red pens is 8 to 1 . Therefore, there are 1 8 as many red pens as black pens in the box. It&rsquo;s also given that there are 40 black pens in the box. Therefore, the number of red pens is 1 8 of the 40 black pens. Thus, the number of red pens is 40 1 8 , or 5 . Choice B is incorrect. This is the number of black pens in the box for every red pen. Choice C is incorrect. This is the number of black pens in the box. Choice D is incorrect. This is the number of red pens in the box if the ratio of black pens to red pens is 1 to 8 .

Question in-a-b