Question

Question #a4d78

Answer 1

Probability is the chance of something happening.

It is always expressed as a fraction or a percentage.

If it's certain something is going to happen the probability will be:
`P=1 or 100%` (note that `P` never gets higher than `1`
The opposite (not) will give a probability of `P=0or0%`

Probability is usually the ratio between what we call succes and the total number of possibilities.

Let me give you a few examples:
If you toss a fair coin, the probability of heads will be one of two possible outcomes:
`P(head)=1/2=50%`

With a die a 6 will be one of six possible outcomes:
`P(6)=1/6~~17%`
If we want the number on the die to be even:
`P(even)=3/6=1/2=50%`