Find the probability that a randomly chosen three-digit number has exactly three factors.

Two consecutive drawings of a digit are made at random from the ten digits 0, 1, 2, …, 9. Find the probability that the product of the chosen digits is zero, given that the first drawn digit is replaced before the second drawing.

find mentally three numbers which are the factors of 4 .

Find the probability that three numbers chosen at random from first nine natural numbers from an A.P.

Fourteen numbered balls (1, 2, 3, …, 14) are divided in 3 groups randomly. Find the probability that the sum of the numbers on the balls, in each group, is odd.

In a school, there are 1000 students, out of which 430 are girls. It is known that out of 430, 10% of the girls study in class XII. What is the probability that a student chosen randomly studies in class XII, given that the chosen student is a girl ?

How many three-digit numbers are divisible by 7?

In a basket, it is known that 1 out of 5 eggs are rotten. 18 eggs are selected randomly. Find the probability that there are exactly 3 rotten eggs. Again find the probability that there are exactly 4 rotten eggs. Which one is greater ?

If 3 tickets are drawn randomly from 2n tickets numbered 1, 2, 3,………,2n, find the probability that the numbers on the chosen tickets are in arithmetic progression.