In a batch of 400 students, 80 students passed only in Chemistry, 90 students passed in both Physics and Maths together, 100 students passed in both Maths and Chemistry together, 150 students passed in Physics and 70 students failed in all the three subjects.
400 ??????? ?? ?? ??? ???, 80 ????? ???? ????? ??????? ??? ??? ???, 90 ????? ?????? ?? ???? ????? ??? ?? ??? ???? ??, 100 ????? ???? ?? ????? ??????? ????? ??? ?? ??? ???????? ???, 150 ????? ?????? ??? ?????? ??? ?? 70 ????? ????? ?????? ??? ???????? ????