Exercise 9 Page 881

When calculating a probability, we are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability of rolling an odd number on a die, we will use the Probability Formula. P=Favorable Outcomes/Possible Outcomes On the die there are 6 numbers. This is the number of possible outcomes. 1, 2, 3, 4, 5, 6 Furthermore, there are 3 numbers that are not divisible by 2 and therefore, odd. This is the number of favorable outcomes. 1, 2, 3, 4, 5, 6 Now we have enough information to calculate P(Odd).

P=Favorable Outcomes/Possible Outcomes

SubstituteValues

Substitute values

P(Odd)=3/6

ReduceFrac

a/b=.a /3./.b /3.

P(Odd)=1/2

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Convert to percent

WriteDec

Write as a decimal

P(Odd)=0.5

WritePercent

Convert to percent

P(Odd)= 50 %

The probability of rolling an odd number on the die is 12, which can be also written as 50 %.