Exercise 16 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 randomly chosen card has an odd number on it we will use the Probability Formula. P=Favorable Outcomes/Possible Outcomes There is a total of 10 cards socks, which is the number of possible outcomes. Out of these, there are five cards that has the odd number: 1, 3, 5, 7, and 9. This means that the number of favorable outcomes is 5. Now we have enough information to calculate P(odd).

The probability of choosing a card with an odd number is 12. Next, we can rewrite the fraction as a decimal and as a percent.

As a Decimal

To write a fraction as a decimal, we divide the numerator by the denominator.

We found that 12 expressed as a decimal is 0.5.

As a Percent

To write a fraction as a percent, we first find an equivalent fraction with a denominator of 100. 1/2=p/100 Let's solve the equation for p.

1/2 = p/100

MultEqn

LHS * 100=RHS* 100

1/2* 100 =p/100* 100

FracMultDenomToNumber

a/100* 100 = a

1/2* 100 = p

MoveRightFacToNumOne

1/b* a = a/b

100/2 = p

CalcQuot

Calculate quotient

50 = p

RearrangeEqn

Rearrange equation

p = 50

The fraction written as a percent is 50 %.