In an examination, 50% of students failed in Physics and 40% in chemistry, and 15% of students failed in both subjects. If 400 students passed in both the subjects find the number of students who appeared in the exam.
A. 1600
B. 500
C. 1200
D. 1000
Answer:A
In an examination, 50% of students failed in Physics and 40% in chemistry, and 15% of students failed in both subjects. If 400 students passed in both the subjects find the number of students who appeared in the exam.
A. 1600 B. 500 C. 1200 D. 1000