Answer:
30 Students
Step-by-step explanation:
Suppose there are a total of 150. If you have 80% adding all the other subjects then 100% - 80% is 20%
20/100 = ?/150 cross multiply
150*20 is 3000
then 3000 divided by 100 is 30
There 30 is your answer!! Hope it helped (P.S sorry its 3 years late I just saw)
