Question

What is the probability of randomly selecting a shape that is green or round?

Answer 1

How many green are there?
How many round are there?

Add them and divide by the total number of objects.

Answer 2

There are three greens and two of them are round

Answer 3

There are 5 round ones
There are 3 green objects

But, of the 5 round ones, two are green. So to ensure we don't over count we need to subtract out these two green ones from the 5 round ones

So total green or round = 3 + 3=6

Divide this by the total number of objects to get the probability you need

Answer 4

so 9/6?

Answer 5

I also need to put it as a percent?

Answer 6

Probabilities are between 0 and 1. We need number of ways for something to happen divided by the total possible ways for things to happen. In our case, there are 6 ways that an object can be round or green and 9 ways for an object, well, to be an object.

so ans = 6/9 = 2/3

Answer 7

No, don't put as a percent.

If they asked, "what is the CHANCE of something" then use percent. Probabilities are between 0 and 1.

Answer 8

Ok I think I understand it now, thanks so much!