SOLUTION: if 19 people get 70% on a test of 100 points what would the 20th persons percent need to be to raise the class average by 1 %

Algebra ->  Probability-and-statistics -> SOLUTION: if 19 people get 70% on a test of 100 points what would the 20th persons percent need to be to raise the class average by 1 %      Log On


   



Question 1145586: if 19 people get 70% on a test of 100 points what would the 20th persons percent need to be to raise the class average by 1 %
Answer by ikleyn(52834) About Me  (Show Source):
You can put this solution on YOUR website!
.

%2819%2A70+%2B+x%29%2F20 = 71.


Solve for x.


It will be your answer.

-----------------

See the lessons
    - Solved problems on average scores, weight, height and temperature
    - Solved problems on average scores
    - Solved problems on average age
in this site. Find there all explanations, if you need them.

Find there many other solved problems, which you may consider as your templates in the future . . .