A true false question has 5 questions.To pass, you need at least 4 correct answers.You guess every answer.What is the probality that you pass?
6/32, or 18.75%The big assumption is that each question is a perfect 50/50 chance. Obviously, if this were a real-world test and you knew the material better or worse, those odds might go up or down. If this were a test about NFL football, my chances might be 70 or 80%; if it were about Renaissance painters, probably 5% or less. Since we're dealing in theoretical stuff here, we'll just assume you have a 50/50 chance of getting the right answer each time -- or "what would happen if you had no knowledge/didn't even read the question and literally just guessed".Since you have a series of 5 binary events, there are basically 2^5 = 32 possible outcomes. Of those outcomes, there are only 6 that satisfy the conditions (C=correct, I=incorrect).C-C-C-C-CI-C-C-C-CC-I-C-C-CC-C-I-C-CC-C-C-I-CC-C-C-C-ISo, the probability of passing, given no other information, is 18.75%
Is this question true or false??? (10 ptss)?
lol yea thats 100% false "pre" means before, so the word "prefix" comes at the beginning or before the word. So, it is impossible for a prefix to be added to the end of a word, thats called a sufix im absolutely positive this is correct 10/10 all of these people answered abve me say true, but they didnt read the question properly, yes many english words come from latin and greek, but prefixes arnt added to the end of words
How many ways are there to answer a 10-question true or false test, where at least 3 of the questions have been answered with a false?
Total ways to answer 10 true or false questions = 2^10 = 1024Let False =F, True = T, and C(n,r) means combination of r objects out of n objects.Required ways = Total ways - 1F . 9T - 2F . 8T= 1024 - C ( 10,1) - C ( 10,2)= 1024 - 10 - 45 = 969 is the required answerTo download Problems related to Permutation and Combination with complete detailed solutions you can visit STUDYPIVOT all downloads are free and no sign up required.
A true/false test has 140 questions. A passing grade is 59% or more correct answers. What is the probability that a person will guess correctly on one true/false question?
If they’re all fair, random, independent guesses (a 50/50 chance of getting true on any guess independent of previous guesses, and without taking any knowledge of the question into account; literally guessing by flipping a coin, and the test is fair, with a T or F able to appear with equal likelihood), then we can model this as a binomial distribution.59% demands that you answer 83 questions (actually 82.6 questions, but that’s like having 2.4 children). What are the odds that you’re significantly luckier than this?Using the cumulative binomial probability formula, we determine that the chances of you getting 83 questions or better in this manor are 0.017, or 1.7%Binomial Probability CalculatorIf instead of guessing, you study enough to be just 60% sure of each answer (instead of the 50% you get with a coin toss), your chances climb to 60.4%, and if you study enough to be just 70% sure of each answer, your chances climb to 99.6% This is why I recommend studying over flipping coins.
Is this true or false ?!?! please help 10 ptss?
Oh dear, I think this should have been posted in the "words and wordplay" section maybe? The only clause I know is Santa Claus
Does "not false" equal "true"?
No, and there’s already some good answers for why here on Quora. I’m adding Russell’s Paradox because it’s a similar situation and I like it. It could be characterized as, “even true, is not always true, every time,” or, “not false, is not always, not false, every time.”Russell’s Paradox celebrated its centennial in 2001. Kurt Godel’s incompleteness theorems Offer an explanation for why Russell’s Paradox exists.____Quote“In the foundations of mathematics, Russell's paradox (also known as Russell's antinomy), discovered by Bertrand Russell in 1901, showed that some attempted formalizations of the naïve set theory created by Georg Cantor led to a contradiction. The same paradox had been discovered a year before by Ernst Zermelo but he did not publish the idea, which remained known only to David Hilbert, Edmund Husserl, and other members of the University of Göttingen.[citation needed]According to naive set theory, any definable collection is a set. Let R be the set of all sets that are not members of themselves. If R is not a member of itself, then its definition dictates that it must contain itself, and if it contains itself, then it contradicts its own definition as the set of all sets that are not members of themselves. This contradiction is Russell's paradox. Symbolically:{\text{Let }}R=\{x\mid x\not \in x\}{\text{, then }}R\in R\iff R\not \in R”Russell's paradox - Wikipedia____End quote
A student takes a ten question true/false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct?
Let X=no. of prob. he guesses right .Now if he has to pass the quiz with more than 70% grade then,he has to guess more than 7 prob. i.e,X=7 or 8 or 9 or 10.Probability of guessing any prob. right is (1/2).similarly,Probability of guessing any prob. wrong is (1/2).Probability of guessing exactly 7 questions right =(10C7)((1/2)^7)*(1/2)^3;(where (1/2)^7 corresponds to the probability of 7 right and (1/2)^3 corresponds to the probability of guessing 3 wrong).similarly,Probability of guessing exactly 8 questions right =(10C8)((1/2)^8)*(1/2)^2;Probability of guessing exactly 9 questions right =(10C9)((1/2)^9)*(1/2)^1;Probability of guessing exactly 10 questions right =(10C10)((1/2)^10)*(1/2)^0;So the total probability is the sum all above probabilities =176/2^10 = 0.171875.
Exam has ten true-or-false questions.If a student guesses at every answer whats probability that he/she will answer exactly five questions correctly?
Around 50%.In the real world, the best strategy is to answer ‘True’ for each question. That will likely earn 6/10 correct.My experience has taught me that there is a bias towards using true statements on True/False tests that favors true statements. Therefore, a student who has no idea what any answer is will most likely pass any true/false test if they guess true each time.That isn’t mathematically sound. Just based on my own experience. I grew up in a family with a lot of teachers. Teachers, psychopaths, and drifters.
If a student is guessing randomly on a true or false quiz with 17 questions, what is the probability of getting 4 incorrect answers?
Given you have two options. The probability of getting 13 correct answers and 4 incorrect answers is ; (1/2)^(13) + (1/2)^(4) = 0.00000762939
Can we use true and false in C?
The names true and false are not defined as keywords in the C language (as of the C11 standard).In C99 (the 1999 C standard), the data type _Bool was officially added to the language.Rather than using _Bool directly and creating your own true and false identifiers, you should #include