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18 Dec 2025, 12:17
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Acc. to question: B and C each have greater than 25 students.
To find: students >= 1 in both B and C
A -> every student not enrolled in B is not enrolled in C => C only should be 0 cause these students are not enrolled in B => C having students greater than 25 must be in common to both B and C => Yes
B -> Directly states all chem are in both B and C which are greater than 25 => Yes
D -> each is enough
To find: students >= 1 in both B and C
A -> every student not enrolled in B is not enrolled in C => C only should be 0 cause these students are not enrolled in B => C having students greater than 25 must be in common to both B and C => Yes
B -> Directly states all chem are in both B and C which are greater than 25 => Yes
D -> each is enough
18 Dec 2025, 12:23
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Bunuel
Statement-1=Every student who is not enrolled in Biology is also not enrolled in Chemistry.
But since Chem>=25, there must be some bio student that are part of bio and also part of chem
Sufficient
Statement-2- Every student enrolled in Chemistry is also enrolled in Biology
since chem>= 25, thus there must be some who are also in Bio
Sufficient
Ans=D
18 Dec 2025, 12:23
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1 - Not enrolled in biology = not enrolled in Chemistry
This means that to be enrolled in biology, one must also be enrolled in Chemistry. Both subject have more than 25 students enrolled.
Hence, this statement alone is sufficient.
2 - Enrolled in Biology = enrolled in Chemistry
More than 25 students are in both.
Hence, this statement alone is sufficient.
Ans - Both statements alone are sufficient
This means that to be enrolled in biology, one must also be enrolled in Chemistry. Both subject have more than 25 students enrolled.
Hence, this statement alone is sufficient.
2 - Enrolled in Biology = enrolled in Chemistry
More than 25 students are in both.
Hence, this statement alone is sufficient.
Ans - Both statements alone are sufficient
