Question

How many signals can be given by 6 Flags of different colours, using 3 Flags at a time?

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Answer 1

Answer:

The correct answer is B.Number of signals using one flag = 6P1 = 6Number of signals using two flags = 6P2 = 30Number of signals using three flags = 6P3 = 120Number of signals using four flags = 6P4 = 360Number of signals using five flags = 6P5 = 720Number of signals using all six flags = 6P6 = 720Therefore the total number of signals using one or more flags at a time is 6 + 30 + 120 + 360 + 720 + 720 = 1956 Using addition principle.

Step-by-step explanation:

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