Ashipping company devises a messaging consisting of 9 flags hung in a line. howmany different messages are possible if communication is constructed from a set of4 white, 3 red, and 2 blue flags. note that ordering of the colors matters, but thatflags of the same color are indistinguishable from one another.

1260

Step-by-step explanation:

The number of permutation of n things in which 'a' things are like , 'b' things are like and so on.. is given by :-

Given : A shipping company devises a messaging consisting of 9 flags hung in a line.

Then, the number of different possible messages constructed from a set of 4 white, 3 red, and 2 blue flags will be :-

Hence, the number of different possible messages constructed from a set of 4 white, 3 red, and 2 blue flags= 1260

b. astronomers

4

step-by-step explanation: