একটি 54 kg ব্যাগ অপসারণ করলে গড় 40 থেকে 38 kg কমে যায়। আসল ব্যাগ গণনা?
A7
B6
C9
D8
Answer & Solution
Correct answer: D. 8
যদি n ব্যাগ থাকত, 40n − 54 = 38(n − 1), যা দেয় n = 8।
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