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1. 12 persons are seated at a circular table. find the probability that 3 particular persons always seated together?

2. A speak truth in 60% cases and B in 80% cases. In what percent of cases they likely to contradict each other narrating the same incident?

3. Out of 14 applicants for a job, there are 6 women and 8 men. it is desired to 2 persons for the job. The probability that atleast one of selected persons will be a woman is?

4. In an examination, there are three sections namely reasoning, maths and english. Reasoning part contains 4 questions. There are 5 questions in maths section and 6 questions english section. If three questions are selected randomly from the list of questions then what is the probability that all of them are from maths?

5. The probability that a person will be alive after 20 years is 1/4 and that of his wife is 2/5. Find out the probability that both are not alive after 20 years?