Five horses are in a race. Mr. A selects two of the horses at random and bets on them. The probability that Mr. A selected the winning horse is (A) `3/5` (B) `1/5` (C) `2/5` (D) `4/5`

(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

From the set {1,2,3,4,5} two numbers a and b (a != b) are chosen at random . The probability that a/b is an integar is

Probability that A speaks truth is 4/5 . A coin is tossed. A reports that a head appears. The probability that actually there was head is (A) 4/5 (B) 1/2 (C) 1/5 (D) 2/5

The probability of throwing a number greater than 2 with a fair dice is 3/5 (b) 2/5 (c) 2/3 (d) 1/3

A number is selected from numbers 1 to 25. The probability that it is prime is (a) 2/3 (b) 1/6 (c) 1/3 (d) 5/6

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

A number is selected at random from the numbrs 3,5,5,7,7,7, 9,9,9,9. The probability that the selected number is their average is 1/(10) (b) 3/(10) (c) 7/(10) (d) 9/(10)

A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is (a) 1/5 (b) 3/5 (c) 2/5 (d) 4/5

Two numbers are selected randomly from the set S={1,2,3,4,5,6} without replacement one by one. The probability that minimum of the two numbers is less than 4 is (a) 1/15 (b) 14/15 (c) 1/5 (d) 4/5

Two numbers are selected randomly from the set S={1,2,3,4,5,6} without replacement one by one. The probability that minimum of the two numbers is less than 4 is (a) 1/15 (b) 14/15 (c) 1/5 (d) 4/5