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# Finding the Probability

Probability is simply the likelihood of an event happening. It can be expressed in the following ways:

1. Equal Probability
2. Likely Probability
3. Unlikely Probability
4. Certain Probability
5. Impossible Probability

1. Equal Probability

Example:

There are 2 pens in a bag: one red, and one blue. Since there is one of each, the likelihood of picking a red or a blue pen is equal, therefore the probability is equal. There is 1 blue pen out of 2 pens, or 12 probability.

2. Likely Probability

Example:

Here we have 3 pens: 2 red, 1 blue. Since we have more red pens, the probability of picking out a red is higher than (likely) that of picking out a blue. The probability, written out in number form is 2 out of 3, or 23.

3. Unlikely Probability

Example:

It's less likely (unlikely) that you would pick out a blue pen, since there are more red than blue. The probability of picking out blue would be written as 1 out of 3, or 13.

4. Certain Probability

The word certain means that an event will definitely happen without a doubt.

Example:

If we had a set of all red balls, we could say that it is certain that we would pick out a red ball from this set, since this is the only option.

5. Impossible Probability

Impossible means that there's no way that event will happen.

Example:

Here, we can say that it is impossible that a black ball will be picked out because there are no black balls in this set.

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