booboo123

OA is a Thanks again for all the help and explanations!

Thanks for your help. To clarify, when asked for the Probability of X or Y, do you always need to subtract the probability of X AND Y? Doesn't the probability of X AND Y fit the constraint of X OR Y? Also, you say that P(W and E) = P(W)*P(E) only when independent. Isn't this example independent as you are only picking one ball? Thanks again! The definition of independent events: Two events, A and B, are independent if the fact that A occurs does not affect the probability of B occurring. So in this case, isn't the probability of the color of the ball independent from what number is written on the ball? Thanks again!

Thanks for the help again. I know that if I assume 64 * k is a multiple of the first 8 positive integers, then the whole problem makes sense. My only question is how do I know for sure that 64*k is a multiple of the first 8 positive integers? Thanks again!

Thanks for the help. How is "e" a misplaced modifier? It basically reads: For consumers and businesses..., the government predicts... Is it because "the government" shouldn't be modifying consumers and businesses, but instead should be "the recent telephone rate cuts" that should modify consumers and businesses? Thanks again!

Thanks a lot for the help!

Thank you for the help. I am still having a little trouble with this one. First, how did you simplify to 1*2^7*3^2*5*7? Also, Statement 1 makes sense to me now as to why it is not sufficient. But for Statement 2, if n =6, couldn't a be anything as long as it is a multiple of the first 8 integers? Am I missing something? Thanks again!

The government predics that, for consumers and businesses that make a large number of long-distance calls, the Federal Communications Commission's recent telephone rate cuts will greatly reduce costs, though some consumer groups disagree with the government's estimates, suggesting they are too optimistic. a. The government predics that, for consumers and businesses that make a large number of long-distance calls, the Federal Communications Commission's recent telephone rate cuts will greatly reduce costs e. For consumers and businesses making a large number of long-distance calls, the government predicts that the recent telephone rate cuts that the Federal Communications Commission has made will greatly reduce costs Which one is correct and why? Thanks!

If the integers a and n are greater than 1 and the product of the first 8 positive integers is a multiple of a^n, what is the value of a? 1. a^n = 64 2. n = 6 I seem to be completely off on this problem, so any help would be greatly appreciated. Thanks!

A manufacturer conducted a survey to determine how many people buy products P and Q. What fraction of the people surveyed said that they buy neither product P nor product Q? 1) 1/3 of the people surveyed said that they buy product P but not product Q 2) 1/2 of the people surveyd said that they buy product Q What is the best way to approach this problem? For some reason, these types of problems seem to confuse me. Thanks!

Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the prob. that hte ball selected will either be white or have an even number painted on it? 1) The prob. that the ball will both be white and have an even number painted on it is 0. 2) The prob. that the ball will be white minus the prob. that the ball will have an even number painted on it is 0.2 I was wondering if the way I approached this problem was incorrect. The question is basically asking for the P(White) + P(Even Number). The first statement tells you that P(White) * P(Even) = 0, and the second statement tells you P(White) - P(Even) = 0.2 Shouldn't we then have enough information to solve for P(White) + P(Even), since there aren't negative probabilities? P(White) would equal 0.2 and P(Even) would be 0? Thanks!

Ahh, thank you so much, so obvious now, guess it's kinda tough for me to study late at night =)

Hi, I was wondering if someone could help me with the following DS problem: Is n an integer? (1) n^2 is an integer (2) sqrt(n) is an integer What would be an example of n^2 being an integer but n not being an integer? Thanks!

Thank you so much, I can't believe I didn't see the "contrary to predicted results". Makes a lot more sense now. Thanks again!

Hi, I was wondering if someone could help me with the following problem: I am having a tough time choosing between a and e as I feel that e changes the meaning of the sentence. I am reading this in the manner that the rational actor model was possibly considered for a foundation of economic theory, but e states that the rational actor model has long been considered a cornerstone of economic theory. Thanks for the help! As a concept once considered for a foundation of economic theory, the rational actor model may soon go the way of the Model T as psychologists have provided more detailed information describing the emotional, familial, and historical factors that affect individual behavior in the marketplace. a. As a concept once considered for a foundation of economic theory, the rational actor model may soon go the way of the Model T as psychologists have provided more detailed information describing the emotional, familial, and historical factors that affect individual behavior in the marketplace. b. The rational actor model, a concept long considered the cornerstone of economic theory, may soon go the way of the Model T as psychologists are providing more detailed information about the emotional, family influence, and history that affect individual behavior in the marketplace. c. A concept long considered the cornerstone of economic theory, the rational actor model, may soon go the way of the Model T for psychologists who provide more detailed information describing the emotional, family influence, and historical factors that affect individual behavior in the marketplace. d. A concept long considered to be the cornerstone of economic theory, the rational actor model, is soon to be going the way of the Model T for psychologists who are providing more detailed information about the emotional, family influence, and historical factors that affect individual behavior in the marketplace. e. The rational actor model, a concept long considered the cornerstone of economic theory, may soon go the way of the Model T as psychologists provide more detailed information describing the emotional, familial, and historical factors that affect individual behavior in the marketplace.

Hi, I was wondering if someone could help me with the following question: I don't seem to agree with the answer, but maybe someone can clarify this question for me. Thanks! A recent study of college students shows that, contrary to predicted results, special nutritional planning does not positively affect students’ grades. Sixty students, half of whom were given a nutritionally balanced diet, had grades no higher than did those students who were not placed on the diet plan. Which of the following, if true, is most useful in determining the accuracy of the study described above? a. Performance of business executives was shown to improve drastically after major alterations were made in their diets. b. Honors students, after altering their diets, maintained that they did not change their study habits. c. Students who participated in various fitness regimens found that their grades improved appreciably after they altered their exercise habits. d. High school students who previously had low grades found that after they altered their diets, their grades improved dramatically. e. All of the college students who volunteered for the study were either in their first or second year of college.