A composite number is selected at random from the first 30 natural numbers and it is divided by 5. The probability that there will be a remainder is

A composite number is selected at random from the first 30 natural numbers and it is divided by 5. The probability that there will be remainder is 14//19 b. 5//19 c. 5//6 d. 7//15

The A . M first 'n' natural numbers is

The mean of first 10 natural numbers.

A number is selected at random from the first twenty-five natural numbers. If it is a composite number, then it is divided by 5 . But if it is not a composite number, it is divided by 2 . The probability that there will be no remainder in the division is

Variance of first 20 natural numbers is

Variance of the first 11 natural numbers is …………….

What is the sum of first n natural numbers ?

Variance of the first 11 natural numbers ........

The average of first 100 natural number is ___.