# Suppose 61 newly created pairs of jeans are placed in a bin to be checked for quality. Of these, 5 will not be of high enough quality to sell. What is the chance that two pairs of jeans selected will be substandard?

##### 1 Answer

Apr 20, 2017

Let's take them out one by one.

#### Explanation:

The chance of the first one to be substandard is

The chance of the second to be *also* substandard is

So the chance of both of them being substandard is:

(this is an AND situation, so we MULTIPLY):

**Extra:**

The chance of only one to be found substandard is: