How many signals can be given by 5 flags of different colours using 3 flags at a time.

120

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উত্তর: 60

Possible ways = 5P3 = 5 × 4 × 3 = 60 [Ways of choosing 3 flags from 5 flags is 5C3. But different signals can be given bay rearranging those 3 flags in 3! ways. So, total possible ways of giving signal = 5C3× 3! = 5P3]

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How many signals can be given by 5 flags of different colours using 3 flags at a time.

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সম্পর্কিত অন্যান্য প্রশ্ন

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If u> t, r> q , s>t, t>r, which of the following must be true?

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

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