SOLUTION: Signals are sent from a battleship by placing four flags on a vertical pole. How many different signals can be formed by selecting the four flags from
1. Four different colore
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-> SOLUTION: Signals are sent from a battleship by placing four flags on a vertical pole. How many different signals can be formed by selecting the four flags from
1. Four different colore
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Question 48480: Signals are sent from a battleship by placing four flags on a vertical pole. How many different signals can be formed by selecting the four flags from
1. Four different colored flags
2. Two different red flags & two identical white flags Answer by longjonsilver(2297) (Show Source):
You can put this solution on YOUR website! 1 4 different red flags:
first flag: 4 possibles
second flag: 3 possibles (since one has been chosen as the first flag)
third flag: 2 possibilities
fourth flag: 1 possible flag.
Total: 4*3*2*1 --> 24 possible ways
2. 2 different red flags (r and R) and 2 identical white flags (W and W)
so answer is 12. Now algebraically we get this by starting with the 24 as the answer for 4 different flags and then dividing by 2! since we have 2 identical flags (the white ones):
