Calculate basic probability by entering the number of outcomes that satisfy the requirement, and total possible outcomes.
Simple example: a coin toss
In a coin toss, you have to choose between head or tails, so there is one outcome which can be head or tails, and two possible outcomes.
Formula:
Probability =
| either head or tails mean one option |
| two possible outcomes |
=
= 0.5 or 50%So the possibility in a coin toss is 50%
Other Example:
Suppose we have a bag of wafers with different forms, 3 of them in a triangle form, 2 in a star form, and 5 in a heart form.
▴ ▴ ▴ ★ ★ ♥ ♥ ♥ ♥ ♥
what is the probability of pulling a triangle?
Probability of triangle =
=
= 0.3 or 30%what is the probability of pulling a star?
Probability of star =
=
= 0.2 or 20%what is the probability of pulling a heart?
Probability of star =
| ♥ ♥ ♥ ♥ ♥ |
| ▴ ▴ ▴ ★ ★ ♥ ♥ ♥ ♥ ♥ |
=
= 0.5 or 50%