Please help me answer this percentage question

[Vivica]

Please help as i'm terrible at maths and this is too tricky for me!

PROBLEM:
There are 2 exams in one module. One exam is worth 30% the other is worth 70% of the overall grade.
You score 60% in the exam worth 30%.
What must you score in the 2nd exam to get an overall 40% in the module.



Thanks in advance!

 

[ksdhart]

I'd start this problem by making a list of everything I know about the problem. Perhaps it might look something like this:

1) The score you need in the whole module is the average of the two individual exam scores
2) The score on the first exam was 60%
3) The first exam is worth 30% of the total
4) The part of the final score which comes from the first exam, then, is equal to 60% of 30%
5) The score of the second exam might be unknown but the percentage of the final score it's worth is known - that's 70%
6) The exact score on the second exam can then be thought of as some percentage (this unknown is what you're solving for) of 70%

From there, try and formulate an equation for the average score of the two tests. Remember that when turning a word problem into a numbers problem, the key word of means multiply.

 

[Steven G]

Please help as i'm terrible at maths and this is too tricky for me!

PROBLEM:
There are 2 exams in one module. One exam is worth 30% the other is worth 70% of the overall grade.
You score 60% in the exam worth 30%.
What must you score in the 2nd exam to get an overall 40% in the module.



Thanks in advance!

Hi. What have you tried? Show us your work, please. This is a math help forum, not a post your problem and we'll do it for you forum.
I will supply you with a hint. Let X be the grade on the 30% module, Y be the grade on the 70% module and Z be the overall average for both module. Then Z=.30X + .70Y. There are three unknowns in this formula and you know two of them. So solve for the unknown.

 

[stapel]

There are 2 exams in one module. One exam is worth 30% the other is worth 70% of the overall grade.
You score 60% in the exam worth 30%.
What must you score in the 2nd exam to get an overall 40% in the module.

To learn how to set up and solve this sort of exercise, try here.

Once you have studied the lesson, please then attempt the exercise. If you get stuck, you can reply with a clear listing of your efforts so far. Thank you!