Algebra 1 Common Core Student Edition, Grade 8-9

Got It? 5. a. In Problem 5, w h at is the probability th a t a senior an d th e n a ju n io r are

chosen?

b. Reasoning Is P (junior th e n senior) different from

P (senior then junior)? Explain.

Lesso n Ch eck

Do y o u k n o w H OW?

Use the cards below.

B 1

1. You choose a card at random. W hat is each
   probability?
   a. P(B or n u m b er) b. P (red or 5)
   c. P(red or yellow) d. P(yellow or letter)


2. W hat is th e probability of choosing a yellow card and
   th e n a D if the first card is n o t replaced before the
   second card is drawn?


3. W hat is the probability of choosing a yellow card an d
   th e n a D if the first card is replaced before the second
   card is drawn?

MAtHEMAtlCAt

Do yo u UN DERSTAN D? PRACTICES

4. Vocabulary W hat is an exam ple of a co m p o u n d
   event com posed of two overlapping events w hen you
   spin a sp in n er with th e integers from 1 through 8?


5. Reasoning Are an event an d its com plem ent m utually
   exclusive or overlapping? Use an example to explain.


6. Open-Ended W hat is a real-w orld exam ple of two
   in d e p e n d e n t events?


7. Error Analysis Describe an d correct the error below in
   calculating P(yellow or letter) from Exercise 1, p art (d).

Igjp? Pract ice and Problem -Solving Exercises

Q Practice

MATHEMATICAL

PRACTICES

You spin the spinner at the right, w hich is divided into equal sections. Find

each probability.

8. P (4 or 7)

11. P(3 or red)


12. P(7 or blue)
    9. P(even or red)


13. P (red or less th a n 3)


14. P (red or m ore th a n 8 )


15. P(odd or 10)


16. P (odd or m ultiple of 3)


17. P(greater than 6 or blue)

You roll a blue num ber cube and a green num ber cube. Find each probability.

17. P (blue even an d green even) 18. P (blue an d green b o th less
    1 9. P (green less th a n 7 an d blue 4) 20. P (blue 1 or 2 an d green 1)

You ch oose a tile at random from a bag containing 2 A’s, 3 B’s, and 4 C's. You

replace the first tile in the bag and then ch oose again. Find each probability.

21. P(Aand A) 22. P(AandB) 23. P(BandB) 24. P(CandC)

2.

4» See Problem

^ See Problem

than 6 )

4* See Problem

25. P(B and C)

780 Chapter 12 Data Analysis and Probability