Hey Anju,

Thank for your time on this.
BUt I have teh following doubt:

What is the Q asking ?
--> If 75 of the total students are enrolled in Geometry, how many of those students are enrolled in Biology?
So how many of those what does those refer to ? What I infer is, it refers to those students out of 75 who are enrolled in Biology?

so the ones who are common.

SO my ans is A.

Also, as per your explanation :

et us assume the numbers of students enrolled in Geometry, Biology, both, and none are G, B, O, and N, respectively.
Hence, (G + B - O + N) = 125 and G = 75
Hence, B = (125 - G + O - N) = (50 + O - N)

Statement 1: (G - O) = 50 ---> O = 25
Still we don't know N.

we have to find O ...why N ? N is none of the students taking B or G.

Pls correct me if I am wrong.


Thanks & Regards,
~Himu.