There are 9 letters having different colors (red, orange, yellow, green, blue, indigo, violet) and 4 boxes each of different shapes (tetrahedron, cube, polyhedron, dodecahedron). How many ways are there to place these 9 letters into the 4 boxes such that each box contains at least 1 letter?
(a) 260100
(b) 878760
(c) 437102
(d) 256850
The question was posed to me in examination.
My enquiry is from Discrete Probability topic in division Discrete Probability of Discrete Mathematics