1.

the number of signals that can be made with 3 flags each of different colour by hosting 1 or 2 or 3 above the other is

Answer»

15Step-by-step EXPLANATION:NUMBER of signal that can be made,⇒ Using FLAG 1 is  3 P 1​ =3⇒ Using 2 FLAGS  3 P 2​ =6⇒ Using 3 flags  3 P 3​ =6So, total signed 3+6+6=15Hence, the answer is 15.



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