May you me or i will get detention

The range is the highest number minus the lowest number. In this case, the highest number is 10 and the lowest number is 6, so the range is 10-6=4

To find the students in the group, simply add up the frequency from each mark. I'll give you an example solution, but I challenge you to do this on your own!

For example, say that there are 4 students with 3 marks and 6 students with 4 marks. There are then 4+6=10 total students in the group

To find the mean, simply add up all up the marks with the amount of frequencies and divide it by the amount of students.

Take our example from earlier - we can write it as a list. Since there are 4 students with 3 marks, we have
3, 3, 3, 3 ( 3 four times)
Since there are 6 students with 4 marks, we have
4, 4, 4, 4, 4, 4 (4 six times)

Add them all up, and divide them by the total amount of students (10) to get 
(3+3+3+3+4+4+4+4+4+4)/10=(3*4+4*6)/10=36/10=3.6

Good luck, and feel free to ask questions if you're confused!

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Step-by-step explanation:

I am assuming that the division problem looks like this:

-2|  1   2   -3   1

Going off that assumption, we will work this problem.  The first thing you always do in the execution of synthetic division is to bring down the first number.  Then multiply that number by the one "outside", which is -2, then put that number up under the next number in the line:

-2|  1   2   -3   1

        -2

    1

Now add the 2 and -2 and bring that down as a 0 and multiply the -2 times the 0:

-2|   1   2   -3   1

         -2    0

     1    0

Now add -3 and 0 to get -3 and multiply that -3 times the -2 and put the product up under the next numbe in line;

-2|   1   2   -3   1

          -2   0  6

     1     0   -3

Now add the 1 and the 6 to get the remainder:

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