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Mathematics 6 Online
OpenStudy (anonymous):

Please help! I don't understand this. Picture of the graph uploaded below. If 300 people donated blood in Springfield, about how many were AB+? (Note that you must multiply by the percent to find out.)

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

I honestly hate problems like this. They are designed to trip people up because of the wiggle room in the values you read off the graph. It's some percentage less than 5%, but the exact percentage? Who knows really. What percentage for AB+ did you get?

OpenStudy (anonymous):

I mean I figured it had to be somewhere around 1% or 1.5% I can't really tell.

jimthompson5910 (jim_thompson5910):

The blue bar for AB+ is larger, and beyond the halfway point from 0% to 5% so I'd say the blue is like 3% maybe?

jimthompson5910 (jim_thompson5910):

but this is an educated guess really

OpenStudy (phi):

I would guess about 3%

jimthompson5910 (jim_thompson5910):

the red bar is below halfway, so 1% or so in total, 1% + 3% = 4% for all of AB+ from both towns

jimthompson5910 (jim_thompson5910):

whatever the percent is, multiply the decimal form of it by 300 to get your answer

OpenStudy (phi):

It sounds like they want only Springfield?

jimthompson5910 (jim_thompson5910):

oh right, nvm the other town then

OpenStudy (anonymous):

I believe the answer is 9.

jimthompson5910 (jim_thompson5910):

3% of 300 = 9, yes

OpenStudy (anonymous):

Ah well, thank you for helping me make sense of it. I'll probably be back with another simple problem that i think is difficult!!

jimthompson5910 (jim_thompson5910):

you're welcome

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