Question

Given 4 flags of different colours, how many different signals can be generated, if a signal requires the use of 2 flags one below the other.

Answer 1

Answer:

12

Step-by-step explanation:

Hi ,

Given there are 4 flags of different colors,

Given that a signal requires the use of 2 flags one below the

other,

Firstly let us chose 2 flags colors which make the signal which

can be selected in ⁴C₂ = 6 ways. Once 2 flags are chosen, say

F₁ and F₂, the signal can be made by keeping F₁ above and F₂

below or F₁ below and F₂ above, which can be done in 2 distinct

ways,

Hence total number of signals that can be formed are 6*2

= 12 (Since it requires selection of 2 signals and arranging one

above and other below)

Hope, it helps!