How the @#!*% do ya solve my daughters 5th grade homework? Impossible?

The range means the gap between the lowest and highest number. So you can pick a range of numbers that is within 20: so let's say 60 and 80.

But if the mean (average) of the grades is 80, then that means there must be some grades below and some above. So let's change that range to 70 and 90 instead. The average of 70+ 90 is 80. You can add as many 80s and you want, and the average will stay at 80 (because 80+80 divided by 2 is 80 still).

11 could be split into 5, 5 and 1. So you could do an equal number of 70s and 90s, plus one 80.

[(70+70+70+70+70) + (90+90+90+90+90) + 80] divided by 11 (the number of students) gives you can average of 80.

Likewise 70+90+80+80+80+80+80+80+80+80+80 divided by 11 is 80.

Likewise 70+70+90+90+80+80+80+80+80+80+80 divided by 11 is 80.

Likewise 70+70+70+90+90+90+80+80+80+80+80 divided by 11 is 80

Etc, etc

B. The mode of set of number is the number that shows up the most. So pick a set of numbers and count how many times each number shows up. That is the mode.

FYI, if the range is 20, the set of numbers cannot be all 80. Then there would be a range of 0.

A: the mean of the grades is otherwise known as the average. If the mean is 80, that means that the total of all 11 grades adds up to 11 x 80, or 880. So you need to come up with 11 grades in total, which add up to 880. Now you're told that the range of grades was 20, in other words the difference between the highest and lowest grade is 20.

As there are 11 grades, and it's easiest to work in pairs, lets just say that one of the grades was the mean value of 80, to get that out of the way. Then that means the other 10 grades have to add up to 800. So you could just say that all of the other 10 grades were 80 too, which would fit the mean. However, you also have to fit them around this range of 20. The easiest way to do that is say that for each pair of grades you have left out of those 10, one was 70 and one was 90. That way, the average of the two was 80, and there are 20 between them which fits the range. You could say that 5 of the grades as 70 and the other 5 90 and that would still fit.

B: the mode is the most common grade in the lot. So if you use the above example, you would have 2 modes - 70 and 90.

Normally, I wouldn't do someone's homework for them, but I feel for her. I hate having the spotlight put on me. Okay, so here's what I would do.There are a few possible solutions, I just did the easiest one.

A.

1. Write down all the info.

-11 students

-range (highest-lowest) is 20.

-mean (all scores added together divided by number of students) of the grades is 80

2. Look at the info. There are 11 students with a mean of 80. So, work backwards. The total of the test scores is 880. That is 80 times 11 (number of students times mean). Therefore, a set of test grades could be 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80

B.

1. The mode is the most occuring number. Therefore, in the above set of test scores, the mode would be 80,

I honestly have a different way of doing this, but this is the way a fifth grader would understand!

I'm pretty sure that range is the highest grade minus the lowest grade. The mean is the average. Mode is the most (the number that appeared the most)

So if the range was 20, and the mean(average) was 80, someone in that class got a 100 because 100-80=20.

I'm not really sure. Its been about a year since I worked on this type of problems

i'm lots older than my little sister. She is likewise interior the 5th grade and he or she is likewise having an identical subject. the different evening, my mom stated as me on the telephone and asked if there grew to become into besides that i ought to end via and have a look into to help my sister with some homework that my mom grew to become into having a annoying time information. My daughter and that i finished via their domicile and my sister grew to become into actual in her room crying via fact she grew to become into so disillusioned. She had 4 pages of math to do and a artwork e book to help instruction manual her with the aid of it. i will't remember precisely what section the math grew to become into in, however the artwork e book and instructors handout wanted the topics finished in an entire distinctive way that I had found out to do them. I also have a bachelors degree and took many college math training and that i could no longer comprehend the way they wanted the priority worked. My mom had tried to help her the previous evening and besides the incontrovertible fact that my mom did help her comprehend and he or she controlled to get the superb solutions, my sisters instructor marked all of the topics incorrect via fact she did no longer artwork them an analogous way that they had confirmed them in college. i grew to become into completely lost. i individually do no longer think of its honest that they assume infants to earnings a thank you to do math issues one specific way. see you later as you comprehend a thank you to artwork with the aid of a issue and be able to get the superb answer, i think of this is all that would desire to rely. i think its ridiculous. i might definitely write a word and have a look into to get a confirm/instructor convention set up. In my opinon, this may well be a a thank you to lots artwork to do at domicile for all people after an entire day of school.

so, your dtr getting answers from others is the way you determine 'school'...all because you don't want her to get in trouble with the teacher...hon, you seriously need to grow up...I'm sure your school offers a website for assisting in this math craze...& I'd suggest you give your dtr a few more simpler problems to solve to be able to lead up to this one....giving her the answer & fretting over it yourself teaches your dtr a lot..but in the wrong way!! you, your dtr & her math teacher seriously need to sit down & have a talk....

Mean (the average, ie add all the numbers together and divide by the amount of numbers) --> http://www.bbc.co.uk/schools/gcsebitesize/maths/da...

Mode (the number that occurs most often in the set) --> http://www.bbc.co.uk/schools/gcsebitesize/maths/da...

If she doesn't understand how to do the work, she should ask questions in class, not rely on yahoo to supply the answers for her.

By the opening paragraph, I do not think a mother has posted this.