Question
In an examination, 53 passed in Maths, 61 passed in Physics, 60 in Chemistry, 24 in Maths & Physics, 35 in Physics & Chemistry, 27 in Maths & Chemistry and 5 in none. Total number of students who had appeared in the examination was 100.
Then, the number of students who passed in all subjects is___
Answer: Option A
:
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Option (c)
S = I + 2II + 3III = 53 + 61 + 60 = 174 --------- (a)
Given that II +3III = 24 + 35 + 27 = 86--------------(b)
(a)-(b) gives us the I +II= 88
Out of 100 students, 5 have passed in none
Therefore, the number of students who have passed in all 3 = 95-88 = 7
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