`(n>=5)` persons are sitting in a row. Three of these are selected at random. The probability that no two of the selected persons sit together is

Statement-1: 20 persons are sitting in a row. Two of these persons are selected at random. The probability that the two selected persons are not together is 0.9. Statement-2 :If overline(A) denotes the negation of an event A, then P(overline(A))=1-P(A) .

Statement-1: 20 persons are sitting in a row. Two of these persons are selected at random. The probability that the two selected persons are not together is 0.9. Statement-2 :If overline(A) denotes the negation of an event A, then P(overline(A))=1-P(A) .

There are m persons sitting in a row. Two of the mare selected at random. The probability that the two selected persons are together

There are n person sitting in a row two of them are selected at random the probability that two selected persons are not together is

There are m persons sitting in a row.Two of the mare selected at random.The probability that the two selected persons are together

Suppose n ge 3 persons are sitting in a row. Two of them are selected at random. The probability that they are together

Persons are sitting in a row. Two of them are selected. Write the probability that they are together.

persons are sitting in a row.Two of them are selected.Write the probability that they are together.

Suppose n ( >=3) persons are sitting in a row. Two of them are selected at random. The probability that they are not together is (A) 1- 2/n (B) 2/(n-1) (C) 1- 1/n (D) nonoe of these