probability

• Probability


  Math dealing with things that only sometimes happen, which may be likely or unlikely
• Probability of an event


  A value that tells how likely that event is to happen
• Probability line


  A number line that goes from 0 to 1, where 0 means impossible, 1 means certain, and 1/2 means equally likely
• Probabilities can be written as fractions, decimals, or percentages
• The sum of all probabilities for the possible outcomes of a trial must be 1 or 100%
• The more trials or experiments conducted, the closer the results will be to the expected probabilities
• Going from fractions to percents


  1. Divide the numerator by the denominator

  2. Multiply by 100
• Percent means per 100
• Dividing the numerator by the denominator


  Gives the decimal form
• Multiplying by 100


  Converts the decimal to percent form
• Repeating decimals can occur when dividing
• Repeating decimals in percent form can be represented with a bar over the repeating digits
• Repeating decimals in percent form can also be rounded to the nearest whole percentage or to the nearest tenth