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Probability
Test Description: Review of Probability
Instructions: Answer all questions to get your test result.
1) Hannah is the costume manager for a large theater company. She has 15 different hats, including 6 crowns. What is the probability that a randomly chosen hat from Hannah's inventory will be a crown?
A
15
B
2/5
C
6
D
6/21
2) The Coffee Spot has 20 pastries for sale, including 2 poppy seed muffins. What is the probability that a randomly selected pastry will be a poppy seed muffin?
A
20
B
2/22
C
2
D
1/10
3) There are 18 pieces of fruit in a basket, including 9 apples. What is the probability that a randomly selected piece of fruit will be an apple?
A
27
B
9
C
1/2
D
1/3
4) You flip a coin once. What is P(not tails)?
A
not possible
B
50/100
C
1
D
1/2
5) You roll a 6-sided die numbered 1-6. What is P(4 or less than 5)?
A
2/3
B
not possible
C
1/6
D
5/6
6) There is a bag with 7 marbles, 4 green, 3 brown.. You pick a marble at random. What is P(not brown)?
A
not possible
B
4/7
C
3/7
D
1, it is certain
7) Of the last 18 contestants on a game show, 6 won a prize. What is the experimental probability that the next contestant will win a prize?
A
1/3
B
3/18
C
1/2
D
not possible
8) Of the last 20 people at a carnival booth, 8 won a prize. What is the experimental probability that the next person at the booth will win a prize?
A
1/2
B
8/28
C
2/5
D
1/9
9) Vera has eaten 6 donuts over the past few months. Of those donuts, 2 were jelly-filled donuts. What is the experimental probability that the next donut Vera eats will be a jelly-filled donut?
A
1/3
B
not possible
C
1/2
D
2/8
10) The Corner Cafe recently served 10 pastries, including 2 peach scones. What is the experimental probability that the next pastry served will NOT be a peach scone?
A
3/4
B
1/2
C
1/5
D
4/5
11) A miniature golf course recently provided its customers with 8 golf balls, of which 4 were purple. Based on experimental probability, how many of the next 14 golf balls handed out should you expect to be purple golf balls?
A
impossible
B
3
C
6
D
7
12) Of the donuts recently sold at Daisy Donuts, 8 had sprinkles and 2 did not. Considering this data, how many of the next 5 donuts sold would you expect to have sprinkles?
A
5
B
all of them
C
4
D
2
*select an answer for all questions
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