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Chilukuri Sai Kartik Grade: 12
        

tHE NO. OF DIFFERENT SIGNALS CAN BE GIVEN USING ANY NUMBER OF FLAGS FROM 4flags of different colour is?


The answer is given as 64.


Plz.explain...

6 years ago

Answers : (2)

Sona Srivastava
38 Points
										

signals using one flag = 4

signals using two flags = (4C2)(2!) .... 4C2-for choosing 2 flags and 2! for their arrangment

signals using three flags = (4C3)(3!)

signals using four flags = (4C4)(4!) 

adding all up gives 64  

6 years ago
Prasanjeet Mohanty Mohanty
37 Points
										

In giving a signal, the order of the placement of colours is important,i.e a red and blue signal is different than the blue and red signal. Hence the order is very important.


Therefore the required no. of ways=4P1 +4P2 +4P3 +4P4 =4+12+24+24=64

6 years ago
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