Ssuming that no one is born on feb. 29 (leap day), how many people should be selected to guarantee that at least 8 were born on the same day, not considering the year?

197


Explanation:

There are 28 days in February for non-leap years. We would need to select at least 28*7+1 = 197 people so that we are guaranteed that at least 8 people were born on the same day.

The worst case scenario is that we pick 7 people born on feb 1, then 7 people for feb 2, and so on til we get up to feb 28. This is a total of 28*7 = 196 people. That extra person will have to somewhere in the calendar for feb. Since its not that leapday, this extra person will make a group of 8. So that's why we need to select at least 197 people (aka 197 people or more). 

Which of the following values are in the range is the function graphed below? check all that applya.3b.1c.0d.-2e.5f.2a