SOLUTION: Please help me solve this average questions:
1) Sabrina scored an average of 68 marks for 3 of her Mathematics tests. She wants to pull up her average score to 70 marks. How many
Algebra.Com
Question 614414: Please help me solve this average questions:
1) Sabrina scored an average of 68 marks for 3 of her Mathematics tests. She wants to pull up her average score to 70 marks. How many marks does Sabrina need to score for her 4th test?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
(3*68+x)/4=70
x=76
another way to look at it is
each of the first three missed 70 by 2
3*2=6
70 +6=76
RELATED QUESTIONS
Please help me solve this problem: Jo wants an average of 90 on her 8 science tests. What (answered by jorel1380)
At a certain high school, the respective weights for the following subjects are:... (answered by ankor@dixie-net.com,jim_thompson5910)
Janice has an average of 74 on the first three tests in her algebra class. On the final... (answered by mananth)
Can you please help me with this question? This question is from Algebra II, A Beka Book. (answered by tutor_paul,bucky)
Mary had an average score of 78 points over x number of tests. How many marks must she... (answered by ankor@dixie-net.com)
some students appeared for mathematics test . average marks scored by successful students (answered by KMST)
Margaret scored 55 points and 65 points on her first two tests on MAT 171. What must she... (answered by ikleyn,greenestamps)
a student completes three tasks and recieves marks of 25,15,12 she completes a fourth... (answered by hollytree)
Could someone please help me with this problem?
The average of Becky Jo's first two... (answered by josmiceli)