Last month more than half of their patients lost at least 7
Last month more than half of their patients lost at least 7 lbs.
Last month at least one of their patients lost more than 10 lbs.
Last month at least one of their patients lost exactly 7 lbs.
Last month all of their patients lost at least 7 lbs.
None of the above statements is true.
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Solution
Using the process of elimination:
#1 . is false as we are talking about the average of last month only.
#2.Remember, a mean / average means you need more than one of something. Some high number and some low numbers. SO it is true.
#3 ,#4 we should not assume the values.
#5.If all of their patients lost atleast 7 lbs then the average should be more than 7lbs.

