Question

A study analyzed 200 polar bear litter sizes (that is,   number of polar bear cubs born to a single mother at one time) in   Canada to evaluate climate change impacts on polar bear litter sizes. For two locations, western Hudson Bay and Lancaster Sound, the size of the litters (that is, the number of cubs) was recorded. The results are shown below.    

Suppose that one of the 200 litters is chosen at random. What is the probability that this litter size was recorded in western Hudson Bay or that the litter size was a single cub?    

		1 cub	2 cubs	3 <	Total
Hudson Bay		28	50	7	85
Lancaster   Sound		15	87	13	115
		43	137	20	200