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There are 100 students in a class. In an...

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 the 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

D

cannot be determined from given information.

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