Correct Answer: Option C
ধরি, ছাত্র-ছাত্রী সংখ্যা=x
শর্তমতে, x(x+25)=7500
or, x2+25x-7500=0
or, x2+100x-75x-7500=0
or, x(x+100)-75(x+100) = 0
or, (x-75) (x+100)=0
∴ x=75
[x = -100(Which is not acceptable)]
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