Just before her last mathematics test this year Rajee’s average mathematics
mark was 89%. She scored 97% in the last test and her average is now 90%.
The number of mathematics tests she wrote this year is__________
Printable View
Just before her last mathematics test this year Rajee’s average mathematics
mark was 89%. She scored 97% in the last test and her average is now 90%.
The number of mathematics tests she wrote this year is__________
In that given sum is....
89x + 97y = 90 (x+y)
89x + 97y = 90x + 90y
7y=x
So any number satisfied this equation will be the result...
Example (1,7) (2,14) (3,21) ......
----------------------------------
suresh
It is very clear that values of Y is 1.
The number of mathematics tests she wrote this year is 8 (7+1).