SOLUTION: Rhona conducts a survey of the ages of students in eleventh grade at her school. On November 1, she finds the average age is 200 months. She also finds that two-thirds of the stude

Algebra ->  Absolute-value -> SOLUTION: Rhona conducts a survey of the ages of students in eleventh grade at her school. On November 1, she finds the average age is 200 months. She also finds that two-thirds of the stude      Log On


   



Question 315095: Rhona conducts a survey of the ages of students in eleventh grade at her school. On November 1, she finds the average age is 200 months. She also finds that two-thirds of the students are within 3 months of the average age. Write and solve an equation to determine the age limits for this group of students.
Answer by malaydassharma(59) About Me  (Show Source):
You can put this solution on YOUR website!
Let S be the total no of students
Then , S/3=200 ......(i)

And, 200-3+%3C=+2S%2F3+%3C=+200%2B3
OR 197+%3C=+2S%2F3+%3C=+203, this also includes eq (i)
Hence, the required inequality is
197+%3C=+S+%3C=+203