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Applying Probability 2
供稿人: Schleper
(原作者: Helfenbein)
What is the probability of randomly selecting a black ball?

4/7
2/7
3/4
3/7
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
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 probability of selecting
a female dog?
(reduce fractions)
dogs
cats
male
13
8
 21/34
3/8
3/5
5/3
female
14
21
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