DECIMAL EXPRESSION OF PROBABILITY

Probability is usually expressed as a ratio of the number of likely outcomes compared with the total number of outcomes possible.

For example, if a coin that has a head on one side and tails on the other side is tossed in the air, when it lands there are two outcomes possible, head or tails, but there would be only one likely outcome. The ratio expression of probability for the coin toss would be expressed 1/2, which looks a lot like a fraction, and that is just what it is.

The decimal of expression of probability for the coin toss would solved by dividing the number of likely outcomes (1) by the total number of outcomes possible (2) or .5. The decimal expression of probability is the chance something will occur is between 0 % and 100% which is written as a number between 0 and 1 in decimal form. For example, 30% is .3 probability.

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