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Question

Number of signals that can be made using given 4 flags of which 3 are blue and 1 is red?


A

12

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B

4!

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C

4

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D

3!

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Solution

The correct option is C

4


We have 4 flags in all and out of which 3 are alike
Here, we are suppose to arrange 4 objects, out of which 3 are of one kind
So, the total possible arrangements would be

Hence 4 signals can be generated.


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