Exercise 1 Page 787

When calculating the experimental probability, we are comparing the number of times the event occurs to the number of times the experiment is done. P=Times the Event Occurs/Times the Experiment Is Done This is very similar to the Probability Formula.

P=Favorable Outcomes/Possible Outcomes Here, we roll a number cube and we gather the results in the table. Let's calculate the total number of times the number cube was rolled.

Number	Times Rolled
1	7
2	9
3	10
4	12
5	6
6	6
Sum	50

We can see that our experiment was done 50 times and we rolled four 12 times. Now we have enough information to calculate P(four).

P=Times the Event Occurs/Times the Experiment Is Done

SubstituteValues

Substitute values

P(four)=12/50

ReduceFrac

a/b=.a /2./.b /2.

P(four)=6/25

The experimental probability that the next roll will be four is 625.