A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively.What is the probability that the problem will be solved?Choices:- 1/2 1/4 3/4 7/12
Question
A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively.What is the probability that the problem will be solved?Choices:- 1/2 1/4 3/4 7/12
Solution
The problem can be solved by finding the probability that at least one of them solves the problem. This is equal to 1 minus the probability that none of them solves the problem.
Step 1: Find the probability that each student does not solve the problem. This is simply 1 minus their respective probabilities of solving the problem. So, for the first student, the probability of not solving the problem is 1 - 1/2 = 1/2. For the second student, it's 1 - 1/3 = 2/3. And for the third student, it's 1 - 1/4 = 3/4.
Step 2: Find the probability that none of them solves the problem. This is the product of their individual probabilities of not solving the problem. So, the probability that none of them solves the problem is 1/2 * 2/3 * 3/4 = 1/4.
Step 3: Find the probability that at least one of them solves the problem. This is 1 minus the probability that none of them solves the problem. So, the probability that the problem is solved is 1 - 1/4 = 3/4.
So, the correct answer is 3/4.
Similar Questions
A problem is given to three students whose chances of solving it are 1/2, 1/3and ¼ respectively. What is the probability that the problem will be solved?
A problem in Statistics is given to the three students A, B, and C whose chances of solving it are 1/3, 1/4 and 1/5 respectively. What is the probability that the problem is solved.a.1/2b.2/3c.1/5d.3/5
A problem is given to three persons P, Q, R whose respective chances of solving it are 2/7, 4/7, 4/9 respectively. What is the probability that the problem is solved?Choices:- 122/147 25/147 120/147 117/147
Q18. The probability that a student knows the correct answer to a multiple choice question is 2/3. If the student does not know the answer, then the student guesses the answer. The probability of the guessed answer being correct is 1/4.Given that the student has answered the question correctly, the conditional probability that the student knows the correct answer is*2/33/45/68/9
A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 4 answer choices – a, b, c, d – and only one correct answer. What is the probability that he answered neither of the problems correctly?Write your answer as a fraction in simplest form.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.