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A new flag has been designed with 6 vertical strips using some or all of the colors yellow,green,blue and red.In how many ways this can be done so that no 2 adjcent strips have same colour.

 Jan 17, 2022
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This might be wrong..

First strip can be colored by = 4ways

2nd strip can be colored by = 3ways

3rd strip can be colored by = 3ways

4th strip can be colored by = 3ways

5th strip can be colored by = 3ways

6th strip can be colored by = 3ways

Then total ways = 4×3×3×3×3×3=12×3^4=12×81= 972

 Jan 18, 2022

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