The teacher rewarded 5/11 of students if you were awarded 50 students how many students were there in all
so if you have 50 students, you need to figure out that 5/11=50. using that idea, can you try to figure out what 10/11 would be? keep in mind that 5/11 is about 45% of the class, so 50=45% of the class, 100=90% of the class. see if you can use that info to solve.