Here's the question you clicked on:
123F
Based on the histogram, how many students were included in the survey? What percentage of the students surveyed babysat for at most three hours last weekend? Show your work.
Firstly, do you know how to read this kind of graph? In other words, how many students babysat for 0 to 3 hours? How many for 4-7 hours?
I meant individually... 0-3 hrs = how many? 4-7 hrs = how many? etc.
0-3 hrs = 20 4-7 hrs = 5 8-11 hrs = 30 12-15 hrs = 25
Correct! Ok, now the next step is this: how many students were included in the survey? Well, that's easy -- just add them all up. :)
You're welcome. But that's the first part of the problem. There is still one part remaining! >What percentage of the students surveyed babysat for at most three hours last weekend? That, too, should be easy. "babysat for AT MOST" three hours means only those who did 0 to 3 hrs. So take that number (the 0-3 hours) and divide it by 90 , the multiply by 100. That's your percent. :)
Oh my, what a sad song. :( Here is a happy song: http://www.youtube.com/watch?v=Ds2RrLNPAHc