Some Puzzles…
February 25, 2009
1 comment
1) A drives from City X to City Y. The first half of the distance of his journey, he drives at a constant speed of 80 km/h. The second half of the distance of his journey, he drives at a constant speed of 120 km/h.
What is the salesman’s average speed for the complete journey?
2) In a class there are 26 children. None of them was born on February 29th.
What is the probability that at least two children have their birthdays on the same day?
