Inferring With Probability

One hundred people who attended a recent concert were classified by age bracket (see the chart). If 2500 people attended the concert, what would be a good prediction for the number of attendees between 13 and 15 years old?

• 675

• 725

• 800

• 925

• 20

• 80

• 60

• 50

• 2

• 4

• 8

• 16

• 164

• 41

• 97

• 116

• 153

• 140

• 147

• 124

Given a standard deck of cards, what is the probability of randomly choosing the 7 of hearts?

• 1/4

• 1/52

• 1/26

• 1/13

• There are no 7s

Given a standard deck of cards, what is the probability of randomly choosing an eight? NOT SIMPLIFIED

• 4/52

• 8/52

• There are no 8s

• 4/13

• 1/13

Given a standard deck of cards, what is the probability of randomly choosing a 7 or an 8? NOT SIMPLIFIED

• 4/52

• 13/52

• 8/52

• 13/26

Given a standard deck of cards, what is the probability of randomly choosing a red card AND a face card? SIMPLIFIED

• 13/52

• 6/52

• 10/52

• 3/26

Given a standard deck of cards, what is the probability of randomly choosing NOT a face card? SIMPLIFIED

• 8/13

• 40/52

• 10/13

• 12/52