Question

7. In how many ways can 5 flags, in which 3 are red, one
is white and one is blue, be arranged on a staff, one
below the other, if flags of one colour are not
distinguishable ?​

Answer 1

Step-by-step explanation:

Total 5 flag

in which 3 are of red color and non distinguishable.

so they can't be arranged.

5!/3!= 20