Which country has adopted Bangla as one of their state languages?

Which country has adopted Bangla as one of their state languages? Correct Answer Sierra Leon

900 জন এর 4% = 900 x .04 = 36 36জন চলে যাওয়ায় বাকি থাকে = 900 - 36 = 864 এবং বাকি 864এর 50% girls = 864 x .50 = 432

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Which country has adopted Bangla as one of their state language?