Stat 119
Name: ______________________
Red id: ______________________
Use the following information to answer questions 12
Suppose a funsize bag of skittles has 5 red, 7 green, 6 purple and 8 yellow (a total of 26 skittles).
You select two skittles from the bag, one at a time, without looking. (Without Replacement)
1. What is the probability that both of the skittles are green?
A) 0.0646
B) 0.0725
C) 0.2692
D) 0.5092
Answer:
2. The probability that exactly one of the two skittles is red is:
A) 0.037
B) 0.162
C) 0.323
D) 0.311
E) 0.155
Answer:
3. Advertisements for statistics texts suggest that 79% come with a CD with statistical tools, 35%
have online help, and 18% have both aids. Find the probability that a randomly selected statistics
text has statistical tools or online help.
A) 1.14
B) 0.18
C) 0.96
D) 0.28
E) 0.61
Answer:
Use the following information to answer questions 46
Are people happy in their marriages?
The table below shows results from the 2002 General
Social Survey for married adults classified by gender and level.
Suppose one married adult is
selected at random.
Gender
Very Happy
Pretty Happy
Not too Happy
Total
Male
221
95
9
325
Female
149
120
9
278
Total
370
215
18
603
4. What is the probability that a married adult selected at random is pretty happy or very happy?
5.
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 Spring '07
 Helen
 Nutrition, Statistics, Probability, Atherosclerosis, Randomness, Vitamin E

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