Exercise 1 Page 304

When calculating the experimental probability, we are comparing the number of times the event occurs to the number of trials. P=Number of Times the Event Occurs/Number of Trials If we roll a number cube, we can roll six different outcomes. The sum of the frequencies of these outcomes is the total number of trials. Let's add them! 13+16+15+17+19+20= 100 From the chart we can read that 19 times we rolled a 5, so the event occured a total of 19 times. Now we have enough information to calculate P(rolling a5).

P=Times the Event Occurs/Number of Trials

SubstituteValues

Substitute values

P(rolling a5)=19/100

CalcQuot

Calculate quotient

P(rolling a5)=0.19

WritePercent

Convert to percent

P(rolling a5)=19 %

The probability of spinning a 5 is 19100, which can also be written as 19 % .