According to me b is sufficient then the table would become
.....................No.studying bio ..............no. not studying bio ......total
no. of boys ............................................................................18
no. of girls...............................................................................2x
total ...................26 ........................................x
therefore 26 +x=18+2X
aS 26+X =total no. of students in class &
18+2x= total no of students in class
Someone please explain a little more in detail why c