Answer:
21/41
Step-by-step explanation:
Find the total number of students
6+7+2+3+6+8+4+5=41
Then find the students that do not study chemistry
6+7+2+5 = 20
P( not study chemistry) = do not study chem)/total
=21/41
Answer: 75(2) OR 25(6)
Step-by-step explanation:75+75 = 150 OR 25+25+25+25+25+25=150