Given `X={1,2,3,....25}`. A student formed a function from X onto X. The probability that function having primes onto primes is `(1)/(25*a*b*c*d)` where a, b, c, d are primes then `a+b+c+d=`

Let 'A={1,2,3,.....n}' and 'B={a,b,c}' , the number of functions from A to B that are onto is

Let A = {1, 2, 3, 4} and B = {a, b}. A function f : A to B is selected randomly. Probability that function is an onto function is

Let y={1,2,3,....25). If a student selects a function randomly from the set of all functions from x onto x, then what is the probability that the selected function maps prime numbers to prime numbers?

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

The least prime is 1 (b) 2 (c) 3 (d) 5

A die is thrown once.The probability of getting a prime number is (2)/(3)(b)(1)/(3)(c)(1)/(2) (d) (1)/(6)

The least prime number is 0 (b) 1 (c) 2 (d) 3

Let (a)/(b)=(c)/(d) (where a and bare odd prime numbers),It c>a and d>b, then:

The smallest number which is neither prime no composite is 0 (b) 1 (c) 2 (d) 3