Question

1.an examination in three subjects algebra,biology ,chemistry was taken by 41 students. the following table shows how many students failed in each single subject and their various combinations: subject a b c ab ac bc abc failed 12 5 8 2 6 3 1 how many students failed at least in one subject?

Answer 1

so since this chart shows which subject a certain number of students failed all of them would fall into the category of failing at least on subject so you just add up all the numbers

12+5+8+2+6+3+1= 37