# The cookie Jar

**Discrete Mathematics**Level 2

*regular* oreo cookies and *golden* oreo cookies.

If a single cookie is selected at random from the jar, the probability that it is *golden* is \(\dfrac13\).

If 2 cookies are selected from the jar, the probability that they are both *golden* is \(\dfrac4{39}\).

What is the total number of cookies in the jar?

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