Question

In: Statistics and Probability

1. Today’s local newspaper lists 27 stocks “of local interest.” Of these stocks, eleven increased, four...

1. Today’s local newspaper lists 27 stocks “of local interest.” Of these stocks, eleven increased, four decreased and twelve remained unchanged yesterday. If we decide to buy three of the stocks, what is the likelihood that all three increased yesterday?

2. You must select a committee of 6 from 28 students. How many different committees can be formed?

3. A survey of 538 students asked: What is your favorite winter sport? And, what type of college do you attend? The results are summarized below:

Favorite Winter Sport

College Type

Snowboarding

Skiing

Ice Skating

Total

Junior College

57

52

70

179

Four-Year College

61

73

44

178

Graduate School

41

45

75

161

Total

159

170

189

518

Using these 518 students as the sample, a student from this study is randomly selected.

  1. What is the probability of selecting a student whose favorite sport is snowboarding and attends a four-year college?

a.

  1. If a graduate student is selected, what is the probability that the student prefers skiing?

b.

Solutions

Expert Solution

for the first two problems we use the concept of combinations

orchestra answered 1 year ago
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