The double-bar graph below shows the marks of five students in maths and science. Which student got the highest marks in maths and science together?
Using the key, we see that the green bars represent the maths marks and the red bars represent the science marks.
The tallest green bar is for Mai, so she scored the highest maths marks.
The tallest red bar is for Mai, so she also scored the highest science marks.
Since Mai received the highest maths mark and the highest science mark, we know that she received the highest marks in maths and science together.