Hi Uma from New York, NY...hope you are have a great day at school. Okay, I'll help you understand the problem.
It would be too easy to just give you the answer. When you learn how to answers these kind of problems, you will be a pro.
Let's identify the things we know:
The problems tells you that you have numbers from 1 through 20
That tells you that is your entire set.
The problem asks you to identify of those 20 numbers that are multiples of 2, which means, what? That they can be divided by 2:
Numbers like: 2, 4, 6....and so on.
Next you determine how many of those numbers you have,
you can label those u (for even numbers Uma found in the set )
Now, to find the fraction, the portion of the entire set of 1 through 20 that are the even numbers. So what you do is determine the number of even numbers (u) and divide that number by the entire number in the set: which would be u = fraction of even number in the
20 set of number 1 through 20
Try that and see if you can solve the problem.
If you need any further assistance, contact me on Wyzant