Question

How many different signals can be made by $5$ flags from $8$ flags of different colors?

• A. $6720$
• B. $2520$
• C. $2448$
• D. $5$

Answer 1

Answer: (A)

$6720$

$5$flags of $8$

Flags number of ways of giving a signal

${}^8{P}_5=8\times 7\times 6\times 5\times 4=56\times 30\times 4=56\times 120$

$=6720$ Signals