tracked the ages of those injured and the kinds of skates worn during injury. In-line skates Roller skates Age 8 3 1 Age 10 3 What is the probability that a randomly selecte injured skater was age 8 given that the injured skater was wearing roller skates? Simplify any fractions.

John runs a computer software store. He counted 124 people who walked by his store in a day, 52 of whom came into the store. Of the 52, only 21 bought something in the store. Estimate the probability that a person who walks by the store will enter the store. Round your answer to the nearest hundredth. Group of answer choices 0.59 0.25 0.42 0.17 none of these choices

What is the probability that a student selected randomly is a Democrat or a Republican? Do not write the "%" in your answer. Round the answer to the nearest percentage. Totals Republican Independent Democrat 98 68 15 15 Preferred Obama 142 12 25 Preferred McCain 105 240 80 40 Totals 120

A group of people were asked if statistics teachers know the true meaning of life. 255 responded "yes", and 497 responded "no". Find the probability that if a person is chosen at random, he believes statistics teachers know the true meaning of life. Probability (Please enter a reduced fraction.) %D