In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Nice try :) !!! Those names are listed, hence can be selected. So the answer is 0.

I have a stick of length 3 cm and I select 2 random points on it and break it at those points to get 3 pieces.

If the probability that these pieces will form a triangle is m/n where m and n are coprime integers then what is the value of m × n?

The population of one town is 485200. If it increases annually at 5%, what will be its population 2 years hence. What was it 2 years ago?