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Video transcript

chelsey asks 600 people at her school their favorite color and graph the results some colors are not on Chelsea's graph how many people chose colors other than those on Chelsea's graph so here's Chelsea's graph she made a bar graph and she listed some favorite colors blue green red yellow pink and graphed people who had those favorite colors but some of these 600 people like me had a different favorite color my favorite color orange isn't on the graph so we're asked how many people like me were not graphed how many people picked a color besides blue green yet red yellow and pink so the way we can figure this out is if we look at the graph and figure out how many of the 600 people are on the graph then we can take that away from the total 600 people to find out how many are not on the graph so we'll start by looking at the graph first one blue this bar lines up to 90 so 90 people picked blue plus next one green lines up to 135 a hundred and thirty five people picked green moving over to red this bar lines up to seventy-five 75 more picked red yellow and pink the bars are the same heights that means the same amount of people picked yellow and red and we can move over and see that that was a hundred and twenty so one hundred and twenty picked yellow and another hundred and twenty picked red so if we combine all of these numbers combined all the people that are on the graph that will help us to figure out how many are not on the graph so let's start let's start with the ones zero ones plus five ones as five ones plus five more ones is ten well zero is still ten plus zero is still 10 so we have 10 ones plus let's look at our tens nine tens plus three tens is 12 tens 12 10s plus seven tens is 1910s 1910s plus two is twenty-one tens and two more tens 21 10s plus two more tens as 23 tens so we have 23 tens or 230 that's zero because we're talking about tens plus we can now do our hundreds only few of these had hundreds we had one hundred plus another 100 is 2 hundreds plus another 100 is 300 so 3 hundreds we have 2 zeros now we're talking about hundreds three hundreds and if we add all these 10 plus 230 230 is 240 and 240 plus 300 well let's see that will still be 40 but 200 plus another 300 is 500 so 540 people are on the graph but we're asked how many are not on the graph so up here we see there are 600 total people were asked 600 total people and we want to take away the 540 who were on the graph and that will tell us how many were not on the graph if we take these people away everybody who's left is like me whose favorite color is not on the graph so let's do that if we started with 600 and we're subtracting 540 let's the first subtract the 500 600 minus 500 is 100 but we still need to subtract the 4100 is like 10 tens minus 40 which is 4 tens 10 tens minus 4 tens is 6 tens or 60 so there were 60 people who chose colors other than those on Chelsea's graph