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Probability & Odds
供稿人: Helfenbein
What is the probability of randomly selecting a black ball?

4/7
2/7
3/4
3/7
What are the odds of randomly selecting a black ball?

4/7
2/7
3/4
3/7
What are the odds against selecting a pink ball?

5/7
2/7
2/5
5/2
What is the probability of selecting a yellow ball?

5/7
2/7
2/5
5/2
What is the probability of randomly getting
letter B? (reduce fractions)
V  G  I  O  B  E  H  B  A
K  W  Q  X  X  J  L  P  A
What is the probability of randomly
choosing a vowel? (reduce fractions)
V  G  I  O  B  E  H  B  A
K  W  Q  X  X  J  L  P  A
What are the odds of randomly
choosing a X? (reduce fractions)
V  X  I  O  B  E  X  B  A
K  W  Q  X  X  J  L  P  A
What are the odds against choosing
the letter A? (reduce fractions)
V  G  I  O  B  E  H  B  A
K  W  Q  X  X  J  L  P  A
What is the probability of randomly selecting a AC3
student? (reduce fractions)
I have 120 students total. Here is my schedule:
2nd hour - AAT (25 students)
3rd hour - HAAT (20 students)
5th hour - AC3 (25 students)
6th hour - AAT (25 students)
7th hour - AC3 (25 students)
5/12
15/24
5/7
What are the odds against choosing a
HAAT student? (reduce fractions)
I have 120 students total. Here is my schedule:
2nd hour - AAT (25 students)
3rd hour - HAAT (20 students)
5th hour - AC3 (25 students)
6th hour - AAT (25 students)
7th hour - AC3 (25 students)
1/5
5/1
1/4
How many outcomes are there in the sample space
made by this tree diagram?
red
blue
1

2

1

2


long
short
long
short
long
short
long
short
What is the odds of selecting a male?
(reduce fractions)
dogs
cats
male
13
8
 3/5
23/58
13/8
13/21
female
14
21
What is the odds against selecting a cat?
(reduce fractions)
dogs
cats
male
13
8
 11/17
23/35
17/11
13/21
female
14
21
What is the probability of selecting
a female dog?
(reduce fractions)
dogs
cats
male
13
8
 21/34
3/8
3/5
5/3
female
14
21
What are the odds in favor of selecting
a female dog?
(reduce fractions)
dogs
cats
male
13
8
 21/34
21/56
3/5
5/3
female
14
21
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