Question

In the class of 45 students it is known that 24 of them do art 20 do chemistry 22 do biology all of the students do at least one of the three subject while 7 do art and biology 6 do art and chemistry but only not biology and do chemistry and biology
How many do
1, biology only or chemistry only or art only
2, two subject

Answer 1

I need your answer please

Answer 2

Now

Answer 3

make a Venn diagram