Question

36. There are 100 students in a class. In an
examination, 50 of them failed in
Mathematics, 45 failed in Physics, 40 failed
in Biology and 32 failed in exactly two of
three subjects. Only one student passed in
all the subjects. Then the number of students
failing in all the three subjects
(a) is 12
(b) is 4
(c) is 2
Ans. is (c)
Need solution or venn diagram to solve it.? ​

Answer 1

Answer:

Number of pass student in exam=100-5=95

50+70=120

120-95=25

25 student pass in both subject

95-25=70

70student pass in one subject