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Name _____________________________
Date ___________________
Probability
Find the number of possible choices when you choose one item from each category.
1.   14 video games, 7 CDs


2.   6 pairs of sunglasses, 10 socks, 5 scarves


3.   3 colors, 9 styles



Find the probability. Write your answer as a fraction in simplest form.
1.   You roll a number cube numbered from 1 to 6.
P(6, 2, 3, 1, or 4).


2.   You roll a number cube numbered from 1 to 6.
P(4).



Find the probability. Write your answer as a decimal rounded to the nearest hundredth.
1.   A number from 22 to 31 is drawn at random.
P(not a 26).


2.   You roll a number cube numbered from 1 to 6.
P(not a 3).



Find the probability. Write your answer as a percent rounded to the nearest whole percent.
1.   A number from 21 to 29 is drawn at random.
P(a prime number).


2.   A jar contains 14 navy, 21 violet, 6 blue, and 21 gray marbles. A marble is drawn at random.
P(not gray).



 

Key #2
aKey #2
Find the probability.
1.   A jar contains 6 blue, 17 orange, and 7 yellow marbles. A marble is drawn at random.
P(blue or orange)
Express the probability as a decimal. Round to the nearest hundredth.


2.   A jar contains 7 violet, 23 navy, 4 white, and 25 purple marbles. A marble is drawn at random.
P(not violet)
Express the probability as a fraction.



Find the probability. Assume that the spinner is separated into equal sections.
1.   You roll a number cube numbered from 1 to 6.
You then spin a spinner with 3 sections each with a different color. The spinner has the colors purple, pink, and orange.
P(a number greater than 2 and pink)


2.   You roll a cube which has the numbers 4, 6, 9, 11, 12, and 11 on it. You then spin a spinner which has 3 sections. The letters on the spinner are D, G, and B.
P(B and 4)



Find the probability.
1.   There are 3 blue, 3 black, 6 white, and 5 orange marbles in a hat. You pick 2 marbles from the hat. Marbles are not returned after they have been drawn.
P(the first marble is black and the second marble is orange)


2.   A deck of cards has 4 pink, 5 purple, and 6 green cards. You pick 4 cards from the deck. Cards are not returned to the deck after they are picked.
P(four purple cards in a row)



Find the probability. Assume that the spinner is separated into equal sections.
1.   There are 4 orange, 3 red, and 5 yellow marbles in a hat. You pick 3 marbles from the hat. Marbles are returned after they have been drawn.
P(three orange marbles in a row)


2.   A deck of cards has 3 purple, 5 navy, 3 gray, 4 green, and 4 pink cards. You pick 2 cards from the deck. Cards are returned to the deck after they are picked.
P(the first card is not green and the second card is green)



 

Key #2
aKey #2
Complete.
1.   How many three person committees can be chosen from a group of nine people?


2.   There are 9 things in a hat. How many ways can you pick 5 things from the hat at once?



Complete.
1.   How many permutations can you make from the letters O, Z, and U?


2.   In how many ways can Sean, Sarah, Christopher, James, and Shelby stand in line?



Complete.
1.   How many combinations of two letters are possible from the letters O, F, and W?


2.   Jessica, Anna, and Alexandra ran in a race. In how many different orders can they finish the race?



 


Answer Key


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