Mark the correct alternative in the following:
The number of different signals which can be given from 6 flags of different colours taking one or more at a time, is
Number of signals which can be given using 1 flag = 6P1 = 6
Number of signals which can be given using 2 flag = 6P2 = 30
Number of signals which can be given using 3 flag = 6P3 = 120
Number of signals which can be given using 4 flag = 6P4 = 360
Number of signals which can be given using 5 flag = 6P5 = 720
Number of signals which can be given using 6 flag = 6P6 = 720
As, the operations are independent, so, the total number of different signals which can be given from 6 flags of different colours taking one or more at a time, is
= 6 + 30 + 120 + 360 + 720 + 720
=1956.