/sci/ - Science & Math

>>16132539
mars is a meme. A few trips to get the boots on the surface after which the shine wears off and it turns into a distant wasteland research/prospecting outpost until basic resource extraction begins for early space industrialization efforts. For latter moon is much more important then mars.

Cheap cost to LEO for tonnage is where the real money shot is. Send as many massive probes you want to all the major planets in the system to get as many pretty pictures as you want. Cassini will look like a alibaba DIY drone compared to whats coming

Hey /sci/, my mind is fried at the moment, but I've been trying to figure this out for quite a while now:

In how many different ways can I order the set {1 2 3 1 2 3}, or the set {1 1 1 2 2 2}? Is there a generalization for this?

I know that I can order a set with n elements in n! different ways, but I can't figure out how to do it when the set contains a multiple amount of each element.