A number is chosen at random among the first 100 natural numbers. Find the probability that the number chosen is prime.
Answer: A
There are 25 prime numbers in the set of the first 100 natural numbers. They are:
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89, and 97.