Mat 201 Essay

349 Words2 Pages
Date: 20130419 1. In a poll, respondents were asked whether they had ever been in a car accident. 177 respondents indicated that they had been in a car accident and 107 respondents said that they had not been in a car accident. If one of these respondents is randomly selected, what is the probability of getting someone who has been in a car accident? 177+107=284 107/284=.3767=38% Probability that a person picked will be in a car accident. 2. The data set represents the income levels of the members of a country club. Find the probability that a randomly selected member earns at least $102,000 INCOME (Thousands of dollars) 108 128 82 138 85 108 88 76 158 208 79 98 148 85 128 118 88 168 73 118 11/20 people make over $102,000. 11/20 is .55=55% chance you will find someone that makes over $102,000 3. In a certain class of students, there are 13 boys from Wilmette, 3 girls from Kenilworth, 11 girls from Wilmette, 6 boys from Glencoe, 5 boys from Kenilworth and 6 girls from Glencoe. If the teacher calls upon a student to answer a question, what is the probability that the student will be from Kenilworth? 13+3+11+6+5+6=42 total students. 8 students from kenliworth. 8/42 = 19% chance the student will be from Kenilworth. 4. Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has 4 possible answers. 8 total answers two choices can be made that are correct. 25% chance of getting it right once and half of that would be 12.5% chance of getting both of those rights. 5. Of 1906 people who came into a blood bank to give blood, 300 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure. 300/1906 = .157= 16% chance someone will walk in the door with high blood
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