SOLUTION: Hello , could you please help me with this question. Thank you , my name is John Email j.callaghan@xtra.co.nz In his first five maths tests this year John had an average scor

Question 749364: Hello , could you please help me with this question.
Thank you , my name is John
Email j.callaghan@xtra.co.nz
In his first five maths tests this year John had an average score of 8. In his next two tests he
scored 7 and 5 and after his eighth test his average was 7.5. What was his score in the eighth test?
Q4.
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi John
If the first 5 tests gave an average of 8
then the totals for the 5 tests were 40 (5 x 8)
If his next two tests scored 7 and 5 then his
total now becomes 52 (40 + 7 + 5).
His eighth test brought his average to 7.5
so his total of marks was 60 (8 x 7.5)
Taking 52 away from 60 = 8 his score for the eighth test.
Hope this helps mate.
:-)
RELATED QUESTIONS
hello please help me with this and please if you could answer as soon as posible because... (answered by sudhanshu_kmr)

i need help with the distributive property.......please anyboby if you can please email... (answered by ankor@dixie-net.com)

[ I am reposting because there was a typo in my email when I posted the previous question (answered by josgarithmetic,math_tutor2020)

Hi, my name is Kym and im in 10th grade and am doing Algebra 1 and i have no clue how to... (answered by jim_thompson5910)

john is twice as old as his friend peter. peter is 5 years older than alice. in 5 years,... (answered by stanbon)

Hello, my name is Cody McCullough. I need help witha problem that I am helping my brother (answered by acerX)

Hello! My name is Lavalle. I am having trouble with multiplying/dividing decimals. Please (answered by sarah_adam)

Hello my name is ChristopherI am hoping you can help me on this HW problem... Solve... (answered by stanbon)

Hello! My name is Laila. I need help with this question: Evaluate the following... (answered by rfer)