# Given 5 flags of different colours, how many different signals can be generated if each signal requires the use of 2 flags, one below the other?

**Solution:**

A signal can have only 2 flags. The total number of flags available is 5. So

No. of ways of choosing first flag = 5

No. of ways of choosing the second flag = 4

By fundamental counting principle,

Therefore, total possible number of ways = 5×4 = 20

NCERT Solutions Class 11 Maths Chapter 7 Exercise 7.1 Question 6

## Given 5 flags of different colours, how many different signals can be generated if each signal requires the use of 2 flags, one below the other?

**Summary:**

Given 5 flags of different colours, the number of different signals that can be generated if each signal requires the use of 2 flags, one below the other is 20