69% of the students of a certain class took Mathematics and 47% took Biology. If each student took Biology or Mathematics and 44 took both. What is the total number of students in the class?
ক) 150
খ) 250
গ) 300
ঘ) 275
Related Questions
ক) 15
খ) 25
গ) 40
ঘ) 65
ক) 0%
খ) 15%
গ) 20%
ঘ) 30%
ক) 15 Tk.
খ) 20 Tk.
গ) 25 Tk.
ঘ) 30 Tk.
ক) 4.67
খ) 7.68
গ) 9.28
ঘ) 11.28
ক) 48
খ) 52
গ) 56
ঘ) 60
Note : ধরা যাক, ৪টির গুণিতকগুলো হলো 4x, 4(x+1), 4(x+2), এবং 4(x+3)। তাদের যোগফল: 4x + 4x+4 + 4x+8 + 4x+12 = 200 => 16x + 24 = 200 => 16x = 176 => x = 11. বৃহত্তম সংখ্যাটি হলো 4(x+3) = 4(11+3) = 4 * 14 = 56।
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