JEE Main Mathematics question
The number of signals that can be sent using flags of different colours, taking one or more at a time, is
Answer: (D)
Solution
Signals using flags (order matters) number . Sum over to : . The total is , option (D).
The number of signals that can be sent using flags of different colours, taking one or more at a time, is
Signals using flags (order matters) number . Sum over to : . The total is , option (D).