Unit 8 Test Part 2 - Probability

Permutation, combination, or neither?
Rob and Mary are planning trips to 9 countries this year.  There are 13 countries they would like to visit.  They are deciding which countries to skip.

• combination
• permutation
• neither

Find the theoretical probability of landing on black

• 0
• 3/8
• 1/8

• 1/4
• 1/2

How would you solve?

A reading club offers a choice of 8 books from a list of 40 books. In how many ways can a member make a collection?

• Permutation

• Combination

• Factorial

Picking a President, Vice-President and Treasurer from a group of 10.

• Combination

• Permutation

How many ways can you make a 3-letter arrangements out of the letters in the word

TRAPEZOID.

• Permutation

• Combination

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. They will draw 2 times and draws are made without replacement. What is the Probability of both marbles being purple?

• 2/9

• 1/3

• 1/2

• 1/4

You roll a 6-sided number cube. What is the probability of rolling an even number three times in a row? (leave answer in fraction form in lowest terms)

• 3/100

• 1/8

• 1/6

• 1/2

A bag has 2 yellow marbles and 8 brown marbles. Nancy takes out two marbles without replacing the marbles. What is the probability that they will both be yellow?

• 2/19

• 1/10

• 1/25

• 1/45

Binomial Probability: A company has developed an "easy start" mower that cranks the engine with the push of a button. The company claims that he probability of the mower will start on any push of the button is 0.95. Assume that this is true. On the next 12 uses of the mower, let Y= the number of successful starts of the mower. Find the probability that the mower starts exactly 11 times:

• .01%

• 9.8%

• 54%

• 34.1%

Bonus: How many ways can you arrange the letters SCHOOL?

• 120

• 280

• 300

• 360