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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.

Mathematics
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HELP plz
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?

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Other answers:

25?
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. :)
20+5+30+35=90?
thank you
http://www.youtube.com/watch?v=BbSmCrvlyrA
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

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