What's the Chance? Part 1

The GED often features one or two probability questions.

You will PROBABLY get one. Or two. 

One way to look at these questions is to think...

The chances of one thing happening...

                           ...divided by all possible chances.

For example, what is the chance of spinning a "yellow" when you use the spinner below?

The chance of the "one" thing is 1. (There is one yellow section.)

The "all possible chances" is 4. (There are 4 sections.)

The chances of one thing happening...

                           ...divided by all possible chances is..

1/4. 

Or... 1 out of 4 or...

.25 or...

25%

(These are all equivalents.)

Another example might be...

What is the chance of landing on a colour that has more than 3 letters, when you use the spinner above?

3/4. 

Or... 3 out of 4 or...

.75 or...

75%

So... what if you have 2 spinners? 

See the next post.