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

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

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

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

(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

(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