What is the probability that you land on the land occupied by Indians or Europeans or Egyptians, if Indians , Egyptians , Europeans and Australians resided in a village of area 100km2 which is equally divided among the four civilizations?
0.75
Each civilization occupies an area of 25km2
Probability that you land on a land occupied by Indians or Europeans or egyptians = (25+25+25)100 = 34 = 0.75