প্রশ্ন ও উত্তর
How many signals can be given by 5 flags of different colours using 3 flags at a time.
গণিত Permutation and Combination 07 Oct, 2020
প্রশ্ন How many signals can be given by 5 flags of different colours using 3 flags at a time.
সঠিক উত্তর
60
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