Indians , Egyptians , Europeans and Australians are residing in a village of area 200 km2. If the area is equally divided between the four countries, what is the probability that a particular person who lands in the village, finds himself in the area occupied by either Indians or Europeans?
0.50
Each country occupies an area of 50km2
Probability that the person lands on a land occupied by Indians or Europeans = (50+50)200 = 12 = 0.50