Question

The following table shows the ages of the students currently at a university, given by percentage. Ages are rounded down to the number of whole years.
Age(years) <18 18-19 20-21 22-24 25-28 29-35 36-44
Students (%) 0 27 51 11 5 4 2
a)Represent the data in a percentage cumulative frequency polygon.
Please very very urgent. Send pic of graph with points to be plotted

Answer 1

Answer:

Let Five years ago the age of son be x years and age of father be 7x years

Present age of son =x+5

Present age of father =7x+5

5 years later their age will (x+10) and (7x+10)

∴7x+10=3(x+10)

7x−3x=20

4x=20

x=5

So, the present age of son=x+5=5+5=10years

and the present age of father=7x+5=35+5=40years