Given data:
The total no.of qustions=100
Each question worth 5 marks.
Mei Mei's test score if she got 6 question =
[tex]=100-(6\times5)[/tex][tex]=100-30[/tex][tex]=70[/tex]Mei Mei's test score if she got 6 question =70 marks
Mei Mei's test score if she got xx question =
[tex]100-(xx\times5)[/tex]