Answer:
Possible ways can 9 marbles be arranged in a row = 1680
Step-by-step explanation:
The number of different permutations of n objects where one object repeats a times, a second object repeats b times, and so on is [tex]\frac{n!}{a!*b!*.....}[/tex]
Here n = 9, a = 3, b =3, c = 3
Number of permutations = [tex]\frac{9!}{3!*3!*3!}=\frac{362880}{6*6*6} =1680ways[/tex]
