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প্রথম পাঁচটি স্বাভাবিক সংখ্যার গড় কত?

A2
B3
C3.5
D2.5
Answer & Solution
Correct answer: B. 3
1 + 2 + 3 + 4 + 5 = 15, এবং 15-কে 5 দিয়ে ভাগ করলে 3 হয়।
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