Exercise 1 Page 717

When calculating probability, we are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability that a number less than 5 is rolled on a 6-sided die, we will use the Probability Formula. P=Favorable Outcomes/Possible Outcomes When rolling a 6-sided die, there is a total of 6 possible outcomes. Out of these, there are 4 numbers we could roll that are less than 5. These are our favorable outcomes. Now we have enough information to calculate P(less than5).

P=Favorable Outcomes/Possible Outcomes

SubstituteValues

Substitute values

P(less than5)=4/6

ReduceFrac

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

P(less than5)=2/3

The probability of rolling a number less than 5 is 23, which can also be written as 2:3.