The marks scored by 20 students are as under

The marks scored by 20 students are as under

Marks      no of students       

0-6   -              4           

6-12 -              x

12-18-             5       let a+b=5  

16-24-             y

24-30-             1           

 

If 10 students scored below 14.4 marks and remaining 10 students scored above 14.4 marks,find the value of x and y

 

Since the 5 students in  the middle group could have all scorred below 14.4  OR they could of all scored above 14.4

there are mulpiple answers

 

If    x=1   then  y=9         All below

If    x=2   then  y=8

If    x=3   then  y=7

If    x=4   then  y=6

If     x=5  then  y=5

If     x=6  then  y=4        All above.