math

A mean average of 60 on 6 exams is needed to pass a class my scores are
50, 71,76,57, 66 what grade must I make on the last exam to pass the course

  1. 0
  2. 0
  3. 11
asked by anna
  1. 6 * 60 = 360

    You need a total of 360 points.

    Add up the points you now have and subtract the sum from 360.

    1. 0
    2. 0
    posted by Ms. Sue
  2. x1 = 50 = score of first exam

    x2 = 71 = score of second exam

    x3 = 76 = score of third exam

    x4 = 57 = score of fourth exam

    x5 = 56 = score of fifth exam

    x6 = score of sixth exam


    Average of of 6 exams = ( x1 + x2 + x3 + x4 + x5 + x6 ) / 6 =

    ( 50 + 71 + 76 + 57 + 56 + x6 ) / 6 = ( 310 + x6 ) / 6

    You need average 60 so:

    ( 310 + x6 ) / 6 = 60

    Multiply both sides by 6

    310 + x6 = 360

    Subtract 310 to both sides

    x6 = 50

    Proof:

    ( 50 + 71 + 76 + 57 + 56 + 50 ) / 6 = 360 / 6 = 60

    1. 0
    2. 0
    posted by Bosnian

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics-?mean average with lowest number out?

    A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his

    asked by tony on January 7, 2013
  2. statistics-?mean average with lowest number out?

    A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his

    asked by tony on January 7, 2013
  3. math

    A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his

    asked by tony on January 7, 2013
  4. algebra

    Mike needs at least a 75% average to pass his math course. The class contains 5 exams that are equally weighted. If he scored a 64%, 86%, 71%, and a 90% on the first 4 exams, what score does he need on the final exam to earn at

    asked by Harry on February 2, 2014
  5. word problem, please

    Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C

    asked by Carlos on February 27, 2017
  6. word problem, Im lost on how to set this up

    Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C

    asked by Carlos on February 27, 2017
  7. Statistic- Average

    A mean average of 60 on 6 exams is needed to pass a course. on his first 5 exams, Adam received grades of 46,73,73,63 and 70. If the lowest grade of the exams already taken is to be dropped, what grade must he receive on his last

    asked by tony on January 7, 2013
  8. math

    Scott had an average of 83 on his first three exams. He later scored an average of 92 on the next six exams. What is his average for all nine exams. Round to the nearest tenth if necessary.

    asked by lynda on November 13, 2013
  9. Math

    WebWork = 28% Four exams = 6% each A final = 28% Labwork = 20% Suppose you obtain 100 percent credit on all WeBWorK assignments for this class. What is the minimum average percentage on the exams and labwork that will still get

    asked by Jamie on January 25, 2017
  10. math

    If a student needs an average of 70 or more to pass a course. She has scored 90, 76, and 66 on the first three exams. writing an inequality representing the score she must get on the last test to pass the course letting x be for

    asked by Amanda on April 22, 2007

More Similar Questions