Question

If two out of every fifteen trick or treaters that came to your house last halloween were dressed as spider-man, what proportion of trick or treaters were not dressed as spider-man?

Answer 1

Given:

The fraction of treaters dressed up us halloween, x=2/15.

Let the total trickers be taken as 1.

Now, the proportion of treakers that were not dressed up as spiderman is,

`\begin{gathered} y=1-x \\ =1-(2)/(15) \\ =(15-2)/(15) \\ =(13)/(15) \end{gathered}`