A number is selected at random from the numbers 1 to 30. What is the probability that the selected number is a prime number?

One number is chosen at random from the numbers 1 to 21. What is the probability that it is prime?

A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is (a) 2/3 (b) 1/6 (c) 1/3 (d) (11)/(30)

A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is (2)/(3) (b) (1)/(6)( c) (1)/(3)(d)(11)/(30)

A number is selected at random from the first 1000 natural numbers.What is the probability that the number so selected would be a multiple of 7 or 11?

A number is selected at random from 1 to 50. What is the probability that it is (a) a prime number (b) not a perfect cube (c) a perfect square (d) a triangular number (e) a multiple of 6 (f) not a multiple of 2

A number is selected from the set {2,3,…,30}. The probability that the selected number is a prime number is

A number is selected at random from the set {1, 2, 3, …, 50}. The probability that it is a prime, is

Two different numbers are selected at random from the set S={1, 2, 3, ……10}, then the probability that sum of selected numbers is divisible by 2 a/b, where a and b are co-prime then b is equal to ___.

Two different numbers are selected at random from the set S={1, 2, 3, ……10}, then the probability that sum of selected numbers is divisible by 2 a/b, where a and b are co-prime then b is equal to ___.

One number is selected at random from 1 to 100. The probability that it is a prime number is