A
B
C
D
Explanation
Correct answer: C.
Choice C is correct. It's given that the numbers of piglets in litters , , and are , , and , respectively. The mean number of piglets per litter for these three litters is , which is equivalent to , or .
Why the other choices are wrong
Choice A
Choice A is incorrect. This is the range of the number of piglets per litter for these three litters.
Choice B
Choice B is incorrect. This is the minimum number of piglets per litter for these three litters.
Choice D
Choice D is incorrect. This is the maximum number of piglets per litter for these three litters.