The probability that a random chosen three-digit number has exactly 3 factors is

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

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

The probability that a positive two digit number selected at random has its tens digit at least three more than its unit digit is

Suppose that 5 males out of 100 and 25 females out of l000 are colour blind. A colour blind person is chosen at random. What is the probability that a male is chosen (assume that the number of males and females are equal)?

Three numbers are chosen at random without replacement from {1,2,3,....10}. The probability that the minimum of the chosen number is 3 or their maximum is 7 , is:

A page is selected at random from a book. The probability that the digit at units place of the page number chosen is less than 7 is

20% of the bolts produced in a factory are found to be defective. Find the probability that in a sample of 10 bolts chosen at random, exactly 2 will be defective using binomial distribution.

Three of six vertices of a regular hexagon are chosen at random. The probability that the triangle with three vertices is equilateral is (a) 1/2 (b) 1/5 (c) 1/10 (d) 1/20